Board Thread:General Mod Discussion/@comment-2602:302:D1A6:89B0:C44F:BB4D:DA15:4C5B-20171107210132/@comment-33135838-20171107214004

There will be no issues if you install the mod into an existing vanilla save, HOWEVER, the mod will not work with 1.12.2 as said above. On the other hand, your 1.12.2 blocks will be deleted if you choose to play with the 1.7.10 LOTR mod but nothing else will change. Also, this mod is based around the Middle Earth dimension located in a seperate dimension so gameplay will be restricted if you stay in the overworld. You are able to use your old save but you can not keep 1.12.2 blocks or items, player built structures can be copy pasted into Middle Earth using worldEdit if you really want to