I would like to convert the map from our server (1.14) to a 1.12 version to do a mod up. Can I do it easily, or do I have to do something else?
Make a backup and try it out.
It does not work, it breaks all buildings!
No, something like that does not work. The map will either be completely reset or regenerated or your game will crash.
If you are lucky and should load the world will be missing a lot because Forge will remove everything that is not there in the version.
THIS IS MIST!
I've tried many times AND THE FUNDST!
Although I play on the phone and so but I do not have to delete the world for a long time just because I trust something, wants to override something!
I do not mean to be angry but it's always (somehow) what!
and sorry fals what mist licks LRS!