Hi bivision and to all others whom it may concern,
i just found a really simple solution for the similar Task.
1. Delete Data from Error-Stack PSA-Table using SE14.
The Content will be gone, but in RSA1 --> DTP --> ErrorStack, you will still see the Request ID's former delivering Errors
2. just run the Error-DTP and watch ist Monitor. It will run without Error and stage 0 Records. This Step clears the "Admin" entries from ErrorStack
Tada.
If you like this solution, press "like" :-)