Seaquel
SQL Server error code

SQL Server error 4926

SQL Server raises error 4926 at severity 16, which marks a problem with the query or data that you can correct.

ALTER TABLE ALTER COLUMN DROP ROWGUIDCOL failed because a column does not exist in table '%.*ls' with ROWGUIDCOL property.
Msg4926
Severity16
Group4000–4999

Source: Database Engine events and errors