diff --git a/trace/spec/traces.md b/trace/spec/traces.md
index d3f9cc3..a2355bc 100644
--- a/trace/spec/traces.md
+++ b/trace/spec/traces.md
@@ -61,7 +61,6 @@ LLM span:
         "output.mime_type": "text/plain"
     },
     "events": [],
-    "conversation": null
 }
 ```