Dead Gateway links

Since I moved from my Raspi3/Raspbee I to a new Raspi4/Raspbee II. setup a few days ago, I am having the problem of seeing two dead gateway links on my phoscon app page, both with the IP of the newly set up RaspBee II setup.

I did have problems initially getting the RaspBee II to run, so these might be instances of my previous attempts. I succeeded based on one of the ready-made images provided by phoscon.

How do I get rid of these dead links as they may also be the source of my occasional problems to connect to Phoscon?

Many thanks

NB: I cleared the Safari cache to pre-empt the obvious.

Problem solved. I rebooted the offending gateway with a new IP assigned. There probably was still something stuck in a cache somewhere.