When using JNI in Android Studio I get this error:

FAILURE: Build failed with an exception.

• What went wrong:
  Execution failed for task ':app:transformNativeLibsWithMergeJniLibsForDebug'.
  More than one file was found with OS independent path 'lib/armeabi-v7a/libaac-encoder.so'

I am kinda new to using Native in Android but what could be the issue here?