Hi
Thomas •,
Welcome to Microsoft Q&A forum.
As I understand, DBCC TRACEOFF command did not turn off the flag and you are unable to perform migration.
Could you please refer to https://learn.microsoft.com/en-us/sql/t-sql/database-console-commands/dbcc-traceoff-transact-sql?view=sql-server-ver16 where it is mentioned that it Requires membership in the sysadmin fixed server role.
The issue looks strange, please also share screenshot of the migration error so that we can investigate.
Thanks