Seaquel
SQL Server error code

SQL Server error 2111

SQL Server raises error 2111 at severity 16, which marks a problem with the query or data that you can correct.

Cannot %S_MSG trigger '%.*ls' on %S_MSG '%.*ls' because an INSTEAD OF %s trigger already exists on this object.
Msg2111
Severity16
Group2000–2999

Source: Database Engine events and errors