I DID IT!!!
So I did several things:
I stopped the Zigbee2mqtt container:
docker stop gladys-z2m-zigbee2mqtt
I deleted the container
docker rm gladys-z2m-zigbee2mqtt
I restarted Gladys
docker restart gladys
After that, none of my devices came back online:
I went to the zigbee2mqtt interface and clicked the « enable pairing » button

I was able to re-pair my old devices and also my new devices that I didn’t have time to test.
All that’s left is to test with the CC2652R key and put Gladys back on an SSD.