Yaiic error

[ping86]

I see in my ARN list this error very frequency. Do you now where is the error? Thanks.

java.util.ConcurrentModificationException
    at java.util.LinkedHashMap$LinkedHashIterator.nextEntry(LinkedHashMap.java:346)
    at java.util.LinkedHashMap$ValueIterator.next(LinkedHashMap.java:370)
    at org.yaaic.fragment.ConversationFragment.onCreateView(ConversationFragment.java)
    at com.appeiros.chatsfree.fragments.ChatConversationFragment.onCreateView(ChatConversationFragment.java)
    at android.support.v4.app.Fragment.performCreateView(Fragment.java)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java)
    at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManagerImpl.java)
    at android.support.v4.app.BackStackRecord.run(BackStackRecord.java)
    at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManagerImpl.java)
    at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManagerImpl.java)
    at android.os.Handler.handleCallback(Handler.java:739)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:135)
    at android.app.ActivityThread.main(ActivityThread.java:5274)
    at java.lang.reflect.Method.invoke(Method.java)
    at java.lang.reflect.Method.invoke(Method.java:372)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:909)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:704)