OH2 cant find Homematic-Devices after installing MQTT-Binding

Hi guys,

as the title says, all my homematic-devices are offline (in paperUI) except the bridge-item itself (also in paperUI), after i installed the mqtt-binding.
The LOG now is full with lines like this:

2017-07-25 17:23:45.441 [WARN ] [ematic.handler.HomematicThingHandler] - Device with address 'NEQ164xxxx' not found on gateway 'ccu'
2017-07-25 17:23:45.454 [WARN ] [ematic.handler.HomematicThingHandler] - Device with address 'NEQ136xxxx' not found on gateway 'ccu'
2017-07-25 17:23:45.463 [WARN ] [ematic.handler.HomematicThingHandler] - Device with address 'NEQ158xxxx' not found on gateway 'ccu'
2017-07-25 17:23:45.470 [WARN ] [ematic.handler.HomematicThingHandler] - Device with address 'NEQ158xxxx' not found on gateway 'ccu'

Before the MQTT-Binding everything worked correctly.

Mosquito also runs on the same raspberryPI3 as OH2 does (the ccu2 is a real hardware central for homematic and not homegear).

I tried to reinsall the bridge-item in paperUI and i alsow tried the mqtt-port 1888 instead of 1883.

Uninstalling the mqtt-binding again and deleting the config with following commands does not help (did a reboot after the commands!):

sudo su -s /bin/bash -c '/usr/share/openhab2/runtime/bin/client' openhab
#warten
config:edit org.openhab.mqtt
config:property-list
config:delete --force org.openhab.mqtt

I have to recover a old oh2-backup (/etc/openhab2 and var/lib/openhab2 folder got backed up) to get oh2 working again (backup is of course without the mqtt-binding).

Has anyone another idea?

thank you!!

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