Seaquel
SQL Server error code

SQL Server error 456

SQL Server raises error 456 at severity 16, which marks a problem with the query or data that you can correct.

Implicit conversion of %ls value to %ls cannot be performed because the resulting collation is unresolved due to collation conflict between "%ls" and "%ls" in %ls operator.
Msg456
Severity16
Group0–999

Source: Database Engine events and errors