Determine expiry time of old login names

[garblixa]

Dear Maintainer,

if I want to import users that were previously in the system, the users will get a number appended to the automatically assigned login name.
As I have read here [1], this is related to the logfiles under /var/log/sophomorix/userlog

Would it be possible to either rotate these logfiles after a certain time with logrotate, or to empty the logfiles otherwise?
Alternatively, a switch or a value for an expiration time in the WebUI, which would make it possible to simply control this oneself?

Many thanks
Klaus

See:
[1] https://ask.linuxmuster.net/t/sophomorix-problem-nach-loeschen-von-allen-schuelern/4064/5?u=garblixa