Seaquel
SQL Server error code

SQL Server error 3969

SQL Server raises error 3969 at severity 16, which marks a problem with the query or data that you can correct.

Distributed transaction is not supported while running SQL Server internal query. Check your logon trigger definition and remove any distributed transaction usage if any. If this error is not happening during logon trigger execution, contact production support team.
Msg3969
Severity16
Group3000–3999

Source: Database Engine events and errors