Cannot add new Zigbee sensor with Conbee II / Deconz

Since a few weeks I do have problems with my Aqara Zigbee sensor and Conbee II stick.
I do have a ConbeeII USB stick ( firmware 26720700) with my Pi 3.
This has worked flawlessly for more the a year.
A few weeks ago there was one Aqara multisensor that gave problems ( did not worked anymore) and I tought low battery.
After replacing the battery the sensor did not returned.
All my other Aqara sensors are still OK.

So I bought a new sensor and hoped my problem was solved.
But now I cannot add a new sensor anymore.
When I try to add a new sensor via Deconz it timeouts and do not find the sensor.
When I wait for a minute a sensor appears in Deconz but only the Humidity sensor and indicates that it has a low battery. No other sensor ( temperature, pressure,…) appear.
Even after updating to Homeassistant OS 8.2 the problem still exists.


Humidity 34 sensor -  deCONZ application
Versie Home assistant

How many sensors do you have connected? There are limits.

Here the total number of the Zigbee sensors and devices.I think that this is within the limts?Number of devices

Update 03_07 > After updating to Latest Deconz version, my problem was suddenly solved.