How to remove triggers from the restored database in SQL Server
You have a database trigger that logs DDL event to a table ddl_DBEvents in the database DBMonitor.

You can either delete or disable the trigger from SQL Server Management Studio in the Object Explorer under YourDatabase - Programmability - Database Triggers.



You could also disable or delete the trigger from code:

DISABLE TRIGGER dbtrg_DBEventsmodel ON DATABASE;
DROP TRIGGER dbtrg_DBEventsmodel ON DATABASE;


References:

DISABLE TRIGGER (Transact-SQL) - Books Online
DROP TRIGGER (Transact-SQL) - Books Online