Seaquel
SQL Server error code

SQL Server error 6363

SQL Server raises error 6363 at severity 16, which marks a problem with the query or data that you can correct.

ALTER SCHEMA COLLECTION failed. It cannot be performed on a schema collection that allows laxly validated content and is schema bound. Remove the schema binding before trying to alter the collection.
Msg6363
Severity16
Group6000–6999

Source: Database Engine events and errors