Can't link farm to GC

Hello friends , i come from an Android device to a new IOS device. Now everytime i turn on the game , the game asks me to choose farm . I have 2 choices , one is the old farm from android which of course i want it here also , and one is on lvl 1 which i saved it when i first installed the game on IOS. Now i cant use GC with my old farm , it works only with the new farm on lvl 1. My question is..how can i get rid of that new farm ? Tried even factory resetting my iphone ..still the same problem. Any tips ?

no one knows?