Seaquel
SQL Server error code

SQL Server error 6218

SQL Server raises error 6218 at severity 16, which marks a problem with the query or data that you can correct.

%s ASSEMBLY for assembly '%.*ls' failed because assembly '%.*ls' failed verification. Check if the referenced assemblies are up-to-date and trusted (for external_access or unsafe) to execute in the database. CLR Verifier error messages if any will follow this message%.*ls
Msg6218
Severity16
Group6000–6999

Source: Database Engine events and errors