Failed to load Map

K i got all the my mods on the xbox and i was playing but i decided to switch and use different mods.....now when i use the new mods it wont let me load any of the modded maps....and when i switched bak to the original mods i were using before which worked, won't work any more and says failed to load the map....

somebody plz tell me how 2 fix this

 

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