diff --git a/website/src/components/Edit/EditPage.tsx b/website/src/components/Edit/EditPage.tsx
index 4f2251065..0e42c2057 100644
--- a/website/src/components/Edit/EditPage.tsx
+++ b/website/src/components/Edit/EditPage.tsx
@@ -6,6 +6,7 @@ import type { Row } from './InputField.tsx';
 import { getClientLogger } from '../../clientLogger.ts';
 import { routes } from '../../routes.ts';
 import { backendClientHooks } from '../../services/serviceHooks.ts';
+import { ACCESSION_FIELD } from '../../settings.ts';
 import type { MetadataRecord, ProcessingAnnotationSourceType, SequenceEntryToEdit } from '../../types/backend.ts';
 import type { ClientConfig } from '../../types/runtimeConfig.ts';
 import { createAuthorizationHeader } from '../../utils/createAuthorizationHeader.ts';
@@ -91,7 +92,7 @@ const InnerEditPage: FC<EditPageProps> = ({ organism, dataToEdit, clientConfig,
                 <tbody className='w-full'>
                     <Subtitle title='Original Data' bold />
                     <EditableOriginalData
-                        editedMetadata={editedMetadata.filter(({ key }) => key !== 'accession')}
+                        editedMetadata={editedMetadata.filter(({ key }) => key !== ACCESSION_FIELD)}
                         setEditedMetadata={setEditedMetadata}
                     />
                     <EditableOriginalSequences
diff --git a/website/src/components/SequenceDetailsPage/SequencesBanner.astro b/website/src/components/SequenceDetailsPage/SequencesBanner.astro
index ff8e31b3b..1640d2b58 100644
--- a/website/src/components/SequenceDetailsPage/SequencesBanner.astro
+++ b/website/src/components/SequenceDetailsPage/SequencesBanner.astro
@@ -1,8 +1,7 @@
 ---
 import { getLatestAccessionVersion } from './getTableData';
 import { routes } from '../../routes.ts';
-import type { SequenceEntryHistory } from '../../services/lapisClient';
-import { siloVersionStatuses, type SiloVersionStatus } from '../../services/lapisClient.ts';
+import { type SequenceEntryHistory, type SiloVersionStatus, siloVersionStatuses } from '../../types/lapis';
 import { getAccessionVersionString } from '../../utils/extractAccessionVersion';
 
 interface Props {
diff --git a/website/src/components/SequenceDetailsPage/SequencesDataTableTitle.astro b/website/src/components/SequenceDetailsPage/SequencesDataTableTitle.astro
index a93069295..1b51510f9 100644
--- a/website/src/components/SequenceDetailsPage/SequencesDataTableTitle.astro
+++ b/website/src/components/SequenceDetailsPage/SequencesDataTableTitle.astro
@@ -2,7 +2,7 @@
 import { sentenceCase } from 'change-case';
 
 import { routes } from '../../routes';
-import type { SequenceEntryHistory } from '../../services/lapisClient';
+import { type SequenceEntryHistory } from '../../types/lapis';
 import { getAccessionVersionString } from '../../utils/extractAccessionVersion';
 import { getVersionStatusColor } from '../../utils/getVersionStatusColor';
 import { BackButton } from '../Navigation/BackButton';
diff --git a/website/src/components/SequenceDetailsPage/getTableData.spec.ts b/website/src/components/SequenceDetailsPage/getTableData.spec.ts
index 39d9fd6a4..aa3acf857 100644
--- a/website/src/components/SequenceDetailsPage/getTableData.spec.ts
+++ b/website/src/components/SequenceDetailsPage/getTableData.spec.ts
@@ -1,10 +1,12 @@
 import { err, ok } from 'neverthrow';
 import { beforeEach, describe, expect, test } from 'vitest';
 
-import { getTableData } from './getTableData.ts';
+import { getTableData, getVersionStatus } from './getTableData.ts';
 import { mockRequest, testConfig } from '../../../vitest.setup.ts';
 import { LapisClient } from '../../services/lapisClient.ts';
+import { VERSION_STATUS_FIELD } from '../../settings.ts';
 import type { Schema } from '../../types/config.ts';
+import { siloVersionStatuses } from '../../types/lapis.ts';
 
 const schema: Schema = {
     instanceName: 'instance name',
@@ -189,6 +191,32 @@ describe('getTableData', () => {
     });
 });
 
+describe('getVersionStatus', () => {
+    test('should return status for correct status', () => {
+        const versionStatus = getVersionStatus([
+            {
+                label: 'does not matter',
+                name: VERSION_STATUS_FIELD,
+                value: siloVersionStatuses.latestVersion,
+            },
+        ]);
+
+        expect(versionStatus).toStrictEqual(siloVersionStatuses.latestVersion);
+    });
+
+    test('should throw error for unknown status', () => {
+        expect(() =>
+            getVersionStatus([
+                {
+                    label: 'does not matter',
+                    name: VERSION_STATUS_FIELD,
+                    value: 'unknown status',
+                },
+            ]),
+        ).toThrowError(/Invalid version status: "unknown status"/);
+    });
+});
+
 const nucleotideMutations = [
     { count: 0, proportion: 0, mutation: 'nucleotideMutation1' },
     { count: 0, proportion: 0, mutation: 'nucleotideDeletion1-' },
diff --git a/website/src/components/SequenceDetailsPage/getTableData.ts b/website/src/components/SequenceDetailsPage/getTableData.ts
index 0c83403a7..39f4c7837 100644
--- a/website/src/components/SequenceDetailsPage/getTableData.ts
+++ b/website/src/components/SequenceDetailsPage/getTableData.ts
@@ -1,16 +1,19 @@
 import { sentenceCase } from 'change-case';
 import { err, Result } from 'neverthrow';
 
+import { type LapisClient } from '../../services/lapisClient.ts';
+import { VERSION_STATUS_FIELD } from '../../settings.ts';
+import type { AccessionVersion, ProblemDetail } from '../../types/backend.ts';
+import type { Schema } from '../../types/config.ts';
 import {
-    isSiloVersionStatus,
-    type LapisClient,
+    type Details,
+    type DetailsResponse,
+    type InsertionCount,
+    type MutationProportionCount,
     type SequenceEntryHistory,
     type SiloVersionStatus,
-    siloVersionStatuses,
-} from '../../services/lapisClient.ts';
-import type { AccessionVersion, ProblemDetail } from '../../types/backend.ts';
-import type { Schema } from '../../types/config.ts';
-import type { Details, DetailsResponse, InsertionCount, MutationProportionCount } from '../../types/lapis.ts';
+    siloVersionStatusSchema,
+} from '../../types/lapis.ts';
 
 export type TableDataEntry = { label: string; name: string; value: string | number };
 
@@ -50,18 +53,15 @@ export async function getTableData(
 }
 
 export function getVersionStatus(tableData: TableDataEntry[]): SiloVersionStatus {
-    const versionStatus = tableData.find((pred) => pred.name === 'versionStatus')?.value.toString() ?? undefined;
+    const versionStatus = tableData.find((pred) => pred.name === VERSION_STATUS_FIELD)?.value.toString() ?? undefined;
 
-    if (isSiloVersionStatus(versionStatus) === false) {
-        throw new Error(
-            'Invalid version status: ' +
-                JSON.stringify(versionStatus) +
-                ' not in ' +
-                JSON.stringify(Object.values(siloVersionStatuses)),
-        );
+    const parsedStatus = siloVersionStatusSchema.safeParse(versionStatus);
+
+    if (parsedStatus.success) {
+        return parsedStatus.data;
     }
 
-    return versionStatus as SiloVersionStatus;
+    throw new Error('Invalid version status: ' + JSON.stringify(versionStatus) + ': ' + parsedStatus.error.toString());
 }
 
 export function getLatestAccessionVersion(sequenceEntryHistory: SequenceEntryHistory): AccessionVersion | undefined {
diff --git a/website/src/pages/[organism]/sequences/[accessionVersion]/getSequenceDetailsTableData.ts b/website/src/pages/[organism]/sequences/[accessionVersion]/getSequenceDetailsTableData.ts
index c08b290bd..dbc8a3c07 100644
--- a/website/src/pages/[organism]/sequences/[accessionVersion]/getSequenceDetailsTableData.ts
+++ b/website/src/pages/[organism]/sequences/[accessionVersion]/getSequenceDetailsTableData.ts
@@ -7,8 +7,9 @@ import {
 } from '../../../../components/SequenceDetailsPage/getTableData.ts';
 import { getSchema } from '../../../../config.ts';
 import { routes } from '../../../../routes.ts';
-import { LapisClient, type SequenceEntryHistory, type SiloVersionStatus } from '../../../../services/lapisClient.ts';
+import { LapisClient } from '../../../../services/lapisClient.ts';
 import type { ProblemDetail } from '../../../../types/backend.ts';
+import type { SequenceEntryHistory, SiloVersionStatus } from '../../../../types/lapis.ts';
 import { parseAccessionVersionFromString } from '../../../../utils/extractAccessionVersion.ts';
 
 export enum SequenceDetailsTableResultType {
diff --git a/website/src/services/lapisClient.ts b/website/src/services/lapisClient.ts
index 86e1ba21f..dac103360 100644
--- a/website/src/services/lapisClient.ts
+++ b/website/src/services/lapisClient.ts
@@ -1,41 +1,16 @@
 import type { Narrow } from '@zodios/core/lib/utils.types';
-import { err, ok, Result } from 'neverthrow';
-import { z } from 'zod';
+import { err, ok, type Result } from 'neverthrow';
 
 import { lapisApi } from './lapisApi.ts';
 import { ZodiosWrapperClient } from './zodiosWrapperClient.ts';
 import { getLapisUrl, getRuntimeConfig, getSchema } from '../config.ts';
 import { getInstanceLogger, type InstanceLogger } from '../logger.ts';
+import { ACCESSION_FIELD, VERSION_FIELD, VERSION_STATUS_FIELD } from '../settings.ts';
 import { accessionVersion, type AccessionVersion, type ProblemDetail } from '../types/backend.ts';
 import type { Schema } from '../types/config.ts';
+import { sequenceEntryHistory, type SequenceEntryHistory, siloVersionStatuses } from '../types/lapis.ts';
 import type { BaseType } from '../utils/sequenceTypeHelpers.ts';
 
-export const siloVersionStatuses = {
-    revoked: 'REVOKED',
-    revised: 'REVISED',
-    latestVersion: 'LATEST_VERSION',
-} as const;
-
-export type SiloVersionStatus = (typeof siloVersionStatuses)[keyof typeof siloVersionStatuses];
-export function isSiloVersionStatus(status: string | undefined | null): status is SiloVersionStatus {
-    if (status === undefined || status === null) {
-        return false;
-    }
-    return Object.values(siloVersionStatuses).includes(status as SiloVersionStatus);
-}
-
-export type SequenceEntryHistory = SequenceEntryHistoryEntry[];
-
-const sequenceEntryHistoryEntry = accessionVersion.merge(
-    z.object({
-        versionStatus: z.string().refine((status) => isSiloVersionStatus(status), {
-            message: `Invalid version status`,
-        }) as z.ZodType<SiloVersionStatus>,
-    }),
-);
-
-type SequenceEntryHistoryEntry = z.infer<typeof sequenceEntryHistoryEntry>;
-
 export class LapisClient extends ZodiosWrapperClient<typeof lapisApi> {
     constructor(
         url: string,
@@ -71,35 +46,31 @@ export class LapisClient extends ZodiosWrapperClient<typeof lapisApi> {
         const result = await this.call('details', {
             accession,
             versionStatus: siloVersionStatuses.latestVersion,
-            fields: ['accession', 'version'],
+            fields: [ACCESSION_FIELD, VERSION_FIELD],
         });
 
-        if (result.isOk()) {
-            const data = result.value.data;
+        return result.andThen(({ data }) => {
             if (data.length !== 1) {
-                const problemDetail: ProblemDetail = {
+                return err({
                     type: 'about:blank',
                     title: 'Unexpected number of results',
                     detail: `Expected 1 result, got ${data.length}`,
                     status: 500,
                     instance: 'LapisClient/getLatestAccessionVersion',
-                };
-                return err(problemDetail);
+                });
             }
             const parsedAccessionversion = accessionVersion.safeParse(data[0]);
             if (!parsedAccessionversion.success) {
-                const problemDetail: ProblemDetail = {
+                return err({
                     type: 'about:blank',
                     title: 'Could not parse accession version',
                     detail: `Expected 1 result, got ${data.length}`,
                     status: 500,
                     instance: 'LapisClient/getLatestAccessionVersion',
-                };
-                return err(problemDetail);
+                });
             }
             return ok(parsedAccessionversion.data);
-        }
-        return result;
+        });
     }
 
     public async getAllSequenceEntryHistoryForAccession(
@@ -107,8 +78,8 @@ export class LapisClient extends ZodiosWrapperClient<typeof lapisApi> {
     ): Promise<Result<SequenceEntryHistory, ProblemDetail>> {
         const result = await this.call('details', {
             accession,
-            fields: ['accession', 'version', 'versionStatus'],
-            orderBy: ['version'],
+            fields: [ACCESSION_FIELD, VERSION_FIELD, VERSION_STATUS_FIELD],
+            orderBy: [VERSION_FIELD],
         });
 
         const createSequenceHistoryProblemDetail = (detail: string): ProblemDetail => ({
@@ -119,22 +90,16 @@ export class LapisClient extends ZodiosWrapperClient<typeof lapisApi> {
             detail,
         });
 
-        return result.match(
-            (data) =>
-                Result.combine(
-                    data.data.map((entry) => {
-                        const parsedHistory = sequenceEntryHistoryEntry.safeParse(entry);
-                        return parsedHistory.success
-                            ? ok(parsedHistory.data)
-                            : err(
-                                  createSequenceHistoryProblemDetail(
-                                      `Validation error for ${accession}: ${parsedHistory.error.errors}`,
-                                  ),
-                              );
-                    }),
-                ),
-            (error) => err(error),
-        );
+        return result.andThen(({ data }) => {
+            const parseResult = sequenceEntryHistory.safeParse(data);
+            return parseResult.success
+                ? ok(parseResult.data)
+                : err(
+                      createSequenceHistoryProblemDetail(
+                          `Validation error for ${accession}: ${parseResult.error.toString()}`,
+                      ),
+                  );
+        });
     }
 
     public getSequenceMutations(accessionVersion: string, type: BaseType) {
diff --git a/website/src/services/zodiosWrapperClient.ts b/website/src/services/zodiosWrapperClient.ts
index 3578f683c..3a8b958a4 100644
--- a/website/src/services/zodiosWrapperClient.ts
+++ b/website/src/services/zodiosWrapperClient.ts
@@ -2,7 +2,7 @@ import { Zodios, type ZodiosEndpointDefinitions, type ZodiosInstance } from '@zo
 import type { Narrow } from '@zodios/core/lib/utils.types';
 import type { Aliases, ZodiosAliases } from '@zodios/core/lib/zodios.types';
 import type { AxiosError, AxiosResponse } from 'axios';
-import { type Err, err, ok } from 'neverthrow';
+import { type Err, err, ok, type Result } from 'neverthrow';
 
 import { type InstanceLogger } from '../logger.ts';
 import { problemDetail, type ProblemDetail } from '../types/backend.ts';
@@ -29,7 +29,10 @@ export class ZodiosWrapperClient<Api extends ZodiosEndpointDefinitions> {
         this.zodios = new Zodios(url, api);
     }
 
-    public call<Method extends ZodiosMethods<Api>>(method: Method, ...args: ZodiosMethod<Api, Method>['parameters']) {
+    public call<Method extends ZodiosMethods<Api>>(
+        method: Method,
+        ...args: ZodiosMethod<Api, Method>['parameters']
+    ): Promise<Result<Awaited<ZodiosMethod<Api, Method>['response']>, ProblemDetail>> {
         const zodiosMethod = this.zodios[method] as ZodiosAliases<Api>[Method];
         const zodiosResponse = zodiosMethod(...(args as TypeThatCanBeUsedAsArgs)) as ZodiosMethod<
             Api,
diff --git a/website/src/settings.ts b/website/src/settings.ts
index 0ee2e0976..de9ef3c40 100644
--- a/website/src/settings.ts
+++ b/website/src/settings.ts
@@ -1,6 +1,13 @@
+import { siloVersionStatuses } from './types/lapis.ts';
+
 export const pageSize = 100;
 
+export const ACCESSION_FIELD = 'accession';
+export const VERSION_FIELD = 'version';
+export const VERSION_STATUS_FIELD = 'versionStatus';
+export const IS_REVOCATION_FIELD = 'isRevocation';
+
 export const hiddenDefaultSearchFilters = [
-    { name: 'versionStatus', filterValue: 'LATEST_VERSION', type: 'string' as const },
-    { name: 'isRevocation', filterValue: 'false', type: 'string' as const },
+    { name: VERSION_STATUS_FIELD, filterValue: siloVersionStatuses.latestVersion, type: 'string' as const },
+    { name: IS_REVOCATION_FIELD, filterValue: 'false', type: 'string' as const },
 ];
diff --git a/website/src/types/lapis.ts b/website/src/types/lapis.ts
index 60b34c681..71162311a 100644
--- a/website/src/types/lapis.ts
+++ b/website/src/types/lapis.ts
@@ -1,6 +1,6 @@
 import z, { type ZodTypeAny } from 'zod';
 
-import type { ProblemDetail } from './backend.ts';
+import { accessionVersion, type ProblemDetail } from './backend.ts';
 
 export const lapisBaseRequest = z
     .object({
@@ -50,3 +50,27 @@ function makeLapisResponse<T extends ZodTypeAny>(data: T) {
 export type LapisError = {
     error: ProblemDetail;
 };
+
+export const siloVersionStatuses = {
+    revoked: 'REVOKED',
+    revised: 'REVISED',
+    latestVersion: 'LATEST_VERSION',
+} as const;
+
+export const siloVersionStatusSchema = z.enum([
+    siloVersionStatuses.revoked,
+    siloVersionStatuses.revised,
+    siloVersionStatuses.latestVersion,
+]);
+
+export type SiloVersionStatus = z.infer<typeof siloVersionStatusSchema>;
+
+export const sequenceEntryHistory = z.array(
+    accessionVersion.merge(
+        z.object({
+            versionStatus: siloVersionStatusSchema,
+        }),
+    ),
+);
+
+export type SequenceEntryHistory = z.infer<typeof sequenceEntryHistory>;
diff --git a/website/src/utils/getVersionStatusColor.ts b/website/src/utils/getVersionStatusColor.ts
index a38f8477f..05dc33b2a 100644
--- a/website/src/utils/getVersionStatusColor.ts
+++ b/website/src/utils/getVersionStatusColor.ts
@@ -1,8 +1,8 @@
-import { type SiloVersionStatus } from '../services/lapisClient.ts';
+import { type SiloVersionStatus, siloVersionStatuses } from '../types/lapis.ts';
 
 export const getVersionStatusColor = (versionStatus: SiloVersionStatus) => {
     switch (versionStatus) {
-        case 'LATEST_VERSION':
+        case siloVersionStatuses.latestVersion:
             return 'text-green-500';
         default:
             return 'text-red-500';
diff --git a/website/tests/playwrightSetup.ts b/website/tests/playwrightSetup.ts
index 4c120acff..07bd99b86 100644
--- a/website/tests/playwrightSetup.ts
+++ b/website/tests/playwrightSetup.ts
@@ -3,7 +3,9 @@ import sortBy from 'lodash/sortBy.js';
 
 import { e2eLogger, getToken, lapisUrl, testUser, testUserPassword } from './e2e.fixture.ts';
 import { prepareDataToBe } from './util/prepareDataToBe.ts';
-import { LapisClient, siloVersionStatuses } from '../src/services/lapisClient.ts';
+import { LapisClient } from '../src/services/lapisClient.ts';
+import { ACCESSION_FIELD, IS_REVOCATION_FIELD, VERSION_FIELD, VERSION_STATUS_FIELD } from '../src/settings.ts';
+import { siloVersionStatuses } from '../src/types/lapis.ts';
 
 enum LapisStateBeforeTests {
     NoSequencesInLapis = 'NoSequencesInLapis',
@@ -73,7 +75,7 @@ async function checkLapisState(lapisClient: LapisClient): Promise<LapisStateBefo
         return LapisStateBeforeTests.NoSequencesInLapis;
     }
 
-    const fields = ['accession', 'version', 'versionStatus', 'isRevocation'];
+    const fields = [ACCESSION_FIELD, VERSION_FIELD, VERSION_STATUS_FIELD, IS_REVOCATION_FIELD];
     const [
         shouldBeLatestVersionResult,
         // When SILO can process revocation_entries, we expect two versions.
@@ -85,12 +87,14 @@ async function checkLapisState(lapisClient: LapisClient): Promise<LapisStateBefo
         lapisClient.call('details', { accession: '21', fields }),
     ]);
 
-    const shouldBeLatestVersionAndNotRevoked = sortBy(shouldBeLatestVersionResult._unsafeUnwrap().data, ['version']);
+    const shouldBeLatestVersionAndNotRevoked = sortBy(shouldBeLatestVersionResult._unsafeUnwrap().data, [
+        VERSION_FIELD,
+    ]);
     const shouldBeTwoVersionsAndOneRevoked = sortBy(shouldBeTwoVersionsAndOneRevokedResult._unsafeUnwrap().data, [
-        'version',
+        VERSION_FIELD,
     ]);
     const shouldBeTwoVersionsAndOneRevised = sortBy(shouldBeTwoVersionsAndOneRevisedResult._unsafeUnwrap().data, [
-        'version',
+        VERSION_FIELD,
     ]);
 
     const expectedLatestVersion = [
diff --git a/website/tests/util/createFileContent.ts b/website/tests/util/createFileContent.ts
index 9b666ed81..8fcfca942 100644
--- a/website/tests/util/createFileContent.ts
+++ b/website/tests/util/createFileContent.ts
@@ -3,6 +3,7 @@ import { readFileSync } from 'fs';
 import type { Accession } from '../../src/types/backend.ts';
 import { fastaEntryToString, parseFasta } from '../../src/utils/parseFasta.ts';
 import { metadataTestFile, sequencesTestFile, testSequenceCount } from '../e2e.fixture.ts';
+import { ACCESSION_FIELD } from '../../src/settings.ts';
 
 type FileContent = {
     metadataContent: string;
@@ -41,7 +42,7 @@ export const createModifiedFileContent = (accessions: Accession[]): FileContent
         throw new Error(`ReviseTestPage: expected max ${metadataRows.length - 1} accessions, got ${accessions.length}`);
     }
 
-    metadataRows[0].push('accession');
+    metadataRows[0].push(ACCESSION_FIELD);
     for (let i = 1; i < metadataRows.length && i - 1 < accessions.length; i++) {
         metadataRows[i].push(accessions[i - 1].toString());
     }