Please translate your screenshots to match the topic language, thx.
This is very easy with Google lens:
Now a word about this “instruction”:
If it’s a battery-powered device, press a button while pairing to keep it active.
That’s bull, and just plain wrong: that way, in fact, you are resetting and activating the device in an endless loop!
The correct way is:
While pairing, press the pair button briefly every 1 to 2 seconds to keep the device active
.
This is the “wonderful” ‘smart’ feature called grouping. Manufacturers don’t take in account people are using different brands @ one mesh, and might like to disable it all together;
There’s one fix: replace the zigbee devices of one of the two brands by devices which don’t listen/send to groups by themselves.
Detailed info: