Gonna paste what I wrote yesterday when I replied to a similar question:
“Older Aqara devices (using Zigbee 1.2 instead of Zigbee 3.0) were known to be hard headed and would try to maintain a connection to the first device you paired them to. Remove them from the network, find the closest zigbee device for each one, then click “add devices via this device” in the router device page. That should sort out your issue.”