I tried to reset a deco m9 with the button on the back. Now the light is solid red (or yellow?) for more than 20 minutes… it does not change… how long does it normally take to reset a deco m9 model?

I deleted my old network name (which was confirmed in the app) and went on to re-set my entire deco network (4 deco m9s). with the fresh setup, it says I cannot use my old network name because it is o