# Description

In aleph-node 13 [polkadot-sdk
code](https://github.com/Cardinal-Cryptography/polkadot-sdk/blob/aleph-v1.2.0/substrate/client/network/sync/src/lib.rs#L516)
there's a check against 0x0 block hash. This causes to ban nodes on 14
version by nodes on 13 version, causing unwanted behaviour.

## Type of change

Please delete options that are not relevant.

- Bug fix (non-breaking change which fixes an issue)

---------

Co-authored-by: timorleph <[email protected]>