> SELECT a.RDB$SYSTEM_FLAG
> FROM RDB$TRIGGERS a
> where a.RDB$TRIGGER_NAME = 'CHECK_41';
>
>
> Try setting the rdb$system_flag manually to 4 and see if that helps.
>

I have tried to update manually rdb$system_flag, but i get an error =>

Unsuccessful execution caused by system error that does not preclude successful execution of subsequent statements.action cancelled by trigger (1) to preserve data integrity.
Cannot update trigger used by a CHECK Constraint.

I have seen that new check constraints has a value of 3, but the other ones has 0 value.