Import sessions authorization wit Schema Exchange

I am trying to import records into the TTTAAD231000 table to massively deny access to sessions for specific accounts. I am using a schema exchange. I apply the convert to the affected users. Unfortunately this is not working and the user can open the listed sessions. If I insert the record with the session ttaad213m000 and I apply the convert it is working: the access to the session is denied. The record entry in the TTTAAD231000 tables is exactly the same, but it's clear that the original session is doing something else. Has anybody ever tried to achieve this? what am I missing?