Problem with connecting new satellite RBS850

Hi, today I wanted to add 1 new (extra) satellite (RBS850) to my existing WiFi 6 mesh. It's a simple procedure so I started with the paring via the automised system - add a new satellite. All worked fine, the satellite was recognized and paired... so far so good. Once this was done, I wanted to change the name of the pod so I did. Somehow it lost connection during the change I guess and the original name was left in the base system.... it became impossible to reconnect the new device, I tried everything... removed the new device that wasn't connected anymore via the web interface, even did a full reset and rebuild of my home network... didn't make a change, the 2 older satellites I already had came up in the new config like it was nothing but the new one can't be connected anymore... my tought was that this was due to some hw address that was left in the config but not sure now after a full reset of the base router... any sugestions, ideas or solutions for this??? Would be great, thank you!