@ChristophRo thats funny, we have Debian 10 with Plesk and php 7.4 + 8.2 + 8.3 without any errors on a very high traffic server with big queries.
On a Debian 12 + Plesk has errors, on Debian 12 + ISPConfig - not, but you write you have errors on Debian 10 and me not.
It sounds more and more like...