Trying to establish myself in a modified Ultimate and by current accounts, DivineRPG is the only potential hiccup left with entity ID conflicts ranging from 3 to 7. I just need to know if this is a potential worldbreaker I need to fix first or if I only need futz with it if I run into problems down the road. 
Exact line from console:
[SEVERE] [ForgeModLoader] The mod DivineRPG has attempted to register an entity ID 3 which is already reserved. This could cause severe problems
Exact line from console:
[SEVERE] [ForgeModLoader] The mod DivineRPG has attempted to register an entity ID 3 which is already reserved. This could cause severe problems