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Cannot create new JabberGuestCall instance until the existing instance has been ended. at com.cisco.jabber.guest.sdk.JabberGuestCall.createInstance(JabberGuestCall.java:456)
java.lang.IllegalStateException: Cannot create new JabberGuestCall instance until the existing instance has been ended.
                                                                   at    com.cisco.jabber.guest.sdk.JabberGuestCall.createInstance(JabberGuestCall.java:456)	at com.example.app.activities.JabberGuest.onCreate(JabberGuest.java:106)	at android.app.Activity.performCreate(Activity.java:6001)	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1105)	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2261)	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2368)	at android.app.ActivityThread.access$800(ActivityThread.java:144)	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1285)	at android.os.Handler.dispatchMessage(Handler.java:102)	at android.os.Looper.loop(Looper.java:135)	at android.app.ActivityThread.main(ActivityThread.java:5233)	at java.lang.reflect.Method.invoke(Native Method)	at java.lang.reflect.Method.invoke(Method.java:372)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)