How to upgrade foreman from 1.23.2 to latest version, Please help
Foreman 1.23 is a really really old version. I am not sure if it makes sense to you to upgrade to the next version one after another.
On docs.theforeman.org, the oldest currently published documentation is for Foreman 2.4. So if you want to go this way, you’d have to start in the Foreman Manual: Foreman :: Manual for Foreman 1.24.
Depending on the size of your setup and manual configuration, installing a new Foreman instance might be quicker.