Unknown command received

I’m writing a new driver and I got this message :

Cluster 61184 is declared … This occurs when I press a button on the device.
Capabilities onoff and button are declared …

The only track I found is cmdId:6 !!, but sometimes, I got cmdId = 11 …
I have a similar error with cluster 1280 with cmdId = 1 or 0

But, what does it mean ?
Could it be a lack, or an error, in the mapping between capabilities and clusters ?
I had a look in the zigbee_cluster_specification with no result …

Thank you for your help