Seaquel
SQL Server error code

SQL Server error 1944

SQL Server raises error 1944 at severity 16, which marks a problem with the query or data that you can correct.

Index '%.*ls' was not created because the index key size is at least %d bytes. The %S_MSG index key size cannot exceed %d bytes. If the index key includes implicit key columns, the index key size cannot exceed %d bytes.
Msg1944
Severity16
Group1000–1999

Source: Database Engine events and errors