Android Question Error when using google analytics and airpush ads library

[0CrimsonScythe0]

Hey,

I've been trying to implement airpush ads together with google analytics , but I am getting this error:

Convert byte code - optimized dex.      Error
UNEXPECTED TOP-LEVEL EXCEPTION:
java.lang.IllegalArgumentException: already added: Lcom/google/android/gms/internal/lz;
    at com.android.dx.dex.file.ClassDefsSection.add(ClassDefsSection.java:122)
    at com.android.dx.dex.file.DexFile.add(DexFile.java:161)
    at com.android.dx.command.dexer.Main.processClass(Main.java:685)
    at com.android.dx.command.dexer.Main.processFileBytes(Main.java:634)
    at com.android.dx.command.dexer.Main.access$600(Main.java:78)
    at com.android.dx.command.dexer.Main$1.processFileBytes(Main.java:572)
    at com.android.dx.cf.direct.ClassPathOpener.processArchive(ClassPathOpener.java:284)
    at com.android.dx.cf.direct.ClassPathOpener.processOne(ClassPathOpener.java:166)
    at com.android.dx.cf.direct.ClassPathOpener.process(ClassPathOpener.java:144)
    at com.android.dx.command.dexer.Main.processOne(Main.java:596)
    at com.android.dx.command.dexer.Main.processAllFiles(Main.java:498)
    at com.android.dx.command.dexer.Main.runMonoDex(Main.java:264)
    at com.android.dx.command.dexer.Main.run(Main.java:230)
    at com.android.dx.command.dexer.Main.main(Main.java:199)
    at com.android.dx.command.Main.main(Main.java:103)
1 error; aborting
    Optimized dexer failed. Switching to Standard dexer.

It also happens when using airpush and leadbolt together. Should I contact airpush instead, I think its an issue with the library they provided since the problem does not occur when using leadbolt ads with analytics.

Thanks!

EDIT- found a similar question , please ignore this...