Too many field references to fit in one dex file: 69133; max is 65536.

Too many field references to fit in one dex file: 69133; max is 65536. I used unity 5.43f1 and lates version of android studio 2.3.3 and SDK when add googleplayservice, firebase messaging service, facebook and admob Unity Stop building and show next message - trouble writing output: Too many field references to fit in one dex file: 69133; max is 65536. You may try using multi-dex. If multi-dex is enabled then the list of classes for the main dex list is too large.

I searched solutions about this and find some answers are this : [ export Gradle whith Unity 5.5 and build in android studio whith multi_dex option ] so I upgraded Unity to 5.61 and imported Android studio using multi-dex option and it was successed to build .

BUT I found that building in lower version of android sdk, it could be build whithout 65k error !!!

My question is that why lower version of android sdk can build whitout 65k error but latest version of sdk can not build ? I think there are some problems Unity building in lates version of android SDK or other problem I don't know ?