postfix-script: fatal: Postfix integrity check failed!

[User Gandalf]

  Hello,

I recompiled my kernel today (to 6.1 p2) and today postfix exited with 
this error message in the log:

Jun 20 08:56:54 designaproduct postfix/postfix-script: fatal: Postfix 
integrity check failed!


Otherwise it is working fine (there are no problems with postfix, except 
that it exited once).
How can I find the root of the problem? :-)

Thanks,

   Laszlo