My Minecraft keeps crashing because of StackOverflowError

One day I was playing Minecraft with my favorite mods and I was almost done with my Minecraft Bunker and then my game crashed and it said
The game crashed whilst unexpected error
Error: java.lang.StackOverflowError: Unexpected error
Then I made a new world and it is perfectly fine its only that one world and i've done so much progress on it a couple of hours and I really wanna play and finish it. The Crash Report is in the attachments. 

 

Please help I wanna finish my bunker. And its in version 1.12.2