apt update with the extrepo-distributed signing key for keybase gives

Warning: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. OpenPGP signature verification failed: http://prerelease.keybase.io/deb stable InRelease: Sub-process /usr/bin/sqv returned an error code (1), error message is: Signing key on 222B85B0F90BE2D24CFEB93F47484E50656D16C7 is not bound:            No binding signature at time 2026-02-04T01:08:35Z   because: Policy rejected non-revocation signature (PositiveCertification) requiring second pre-image resistance   because: SHA1 is not considered secure since 2026-02-01T00:00:00Z

The upstream one is OK: https://keybase.io/docs/server_security/code_signing_key.asc