Pushnotification device entity gives attempt to illegally add on object to state

Hello,   We are busy migrating our hybrid webapp from mendix v7 to mendix v9. The app uses the marketplace module 'PushNotifications'. For some reason after the user logs off and then logs in mendix reports : "com.mendix.webui.WebUIException: Attempt to illegally add an object to the state with id '34902897117740752'    at com.mendix.webui.requesthandling.helpers.StateHandling.$anonfun$addObjectsToState$1(StateHandling.scala:133)". For several xas-calls mendix returns server status 560. Those calls have the device object in the parameter list (network console displays them).     The objectid is from an pushnotificition.device.   After logout the device object is deleted and after login there is a new one created. When the user moves to another page the error occurs.   Mendix version: 9.24.15, PusherNotification version: 7.2.3   Any help/explanation would be appreciated.   Jeroen Boerkamp
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