org.greenrobot.eventbus.EventBusException: already registered to event class

FATAL EXCEPTION: main
                                                                      Process: com.moreunion.zhenghao, PID: 6366
                                                                      org.greenrobot.eventbus.EventBusException: Subscriber class com.moreunion.zhenghao.ui.fragment.MainVideoInterrogation already registered to event class com.moreunion.zhenghao.model.RefreshBean
                                                                          at org.greenrobot.eventbus.EventBus.subscribe(EventBus.java:154)
                                                                          at org.greenrobot.eventbus.EventBus.register(EventBus.java:139)
                                                                          at com.moreunion.zhenghao.ui.fragment.MainVideoInterrogation.initView(MainVideoInterrogation.java:76)
                                                                          at com.moreunion.zhenghao.ui.coupon.KPullListFragment.init(KPullListFragment.java:163)
                                                                          at com.moreunion.zhenghao.ui.coupon.KPullListFragment.onCreateView(KPullListFragment.java:122)
                                                                          at android.support.v4.app.Fragment.performCreateView(Fragment.java:2239)
                                                                          at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1332)
                                                                          at android.support.v4.app.FragmentManagerImpl.moveFragmentToExpectedState(FragmentManager.java:1574)
                                                                          at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1641)
                                                                          at android.support.v4.app.BackStackRecord.executeOps(BackStackRecord.java:794)
                                                                          at android.support.v4.app.FragmentManagerImpl.executeOps(FragmentManager.java:2415)
                                                                          at android.support.v4.app.FragmentManagerImpl.executeOpsTogether(FragmentManager.java:2200)
                                                                          at android.support.v4.app.FragmentManagerImpl.optimizeAndExecuteOps(FragmentManager.java:2153)
                                                                          at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:2063)
                                                                          at android.support.v4.app.FragmentManagerImpl$1.run(FragmentManager.java:725)
                                                                          at android.os.Handler.handleCallback(Handler.java:761)
                                                                          at android.os.Handler.dispatchMessage(Handler.java:98)
                                                                          at android.os.Looper.loop(Looper.java:156)
                                                                          at android.app.ActivityThread.main(ActivityThread.java:6523)
                                                                          at java.lang.reflect.Method.invoke(Native Method)
                                                                          at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:942)
                                                                          at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832)