Seaquel
SQL Server error code

SQL Server error 4443

SQL Server raises error 4443 at severity 16, which marks a problem with the query or data that you can correct.

UNION ALL view '%.*ls' is not updatable because column '%.*ls' of base table '%.*ls' is used multiple times.
Msg4443
Severity16
Group4000–4999

Source: Database Engine events and errors