Seaquel
SQL Server error code

SQL Server error 6288

SQL Server raises error 6288 at severity 16, which marks a problem with the query or data that you can correct.

ALTER ASSEMBLY has marked data as unchecked in one or more objects in database "%.*ls". Refer to column "has_unchecked_assembly_data" from system views "sys.tables" and "sys.views" to locate all such objects.
Msg6288
Severity16
Group6000–6999

Source: Database Engine events and errors