Seaquel
SQL Server error code

SQL Server error 4944

SQL Server raises error 4944 at severity 16, which marks a problem with the query or data that you can correct.

ALTER TABLE SWITCH statement failed because column '%.*ls' has data type %s in source table '%.*ls' which is different from its type %s in target table '%.*ls'.
Msg4944
Severity16
Group4000–4999

Source: Database Engine events and errors