HMAC does not match. after delete config.php

I accidentally delete my config.php and I don’t have backups
This is my lab environment so this is OK, but I rally want to know how to repair it in future.

I created new config.php, and set everything with new ‘secret’ and new ‘salt’
Now when I create new user everything work

But when I try to delete one of old user (with php occ user:del) and create new with same username I still got error " HMAC does not match. "

How to fix it ?
Some cache (I removed all data from redis).

Thanks in advanced for help