Hi @paula.kokic ,
I have a thread running here: Upgrading from 15.11.9 - #9 by developeremail3
I dont see any such env variable called GITLAB_SKIP_PG_UPGRADE being set. Even the version of PostgreSQL changed from version 12.12 to 12.14 from Gitlab 15.9.7 to 15.11.13.
My installation is Omnibus, Community Edition, OS would be CentOS.
Also I have two installations of similar configuration, even though for one instance the Postgres gets upgraded automatically while for the other it needs to be upgraded manually.
Also it would be great if you specify as to what kind of logs are you looking for?
Thanks