Change between Pi4 and Pi5 forward and backward

Is is possible to change from Pi5 with V1.8.1 back to Pi4 V1.7.1? Pi4 V1.7.1 comes up and connects with Android tablet with an own IP-address. I changed this IP-address in Kraken App, the configuration screen comes up but it is not polling anymore. I disconnected power from KrakenSDR and Pi4. On the Android the correct “krakensdr” is connected. Yes, I see another “krakensdr” but with an other IP-address. Must I wait a certain time before connecting power line for KrakenSDR again? Or must I delete some EEPROM values? Something else?

I found the solution. Yes, the change between Pi4 and Pi5 forward and backwards is possible. It is very important, that if a user ends an online measurement session, executes in the configuration screen, section “open system control”, the running system with function “shutdown”. In my case, I damaged two SD-cards, one in Pi4 and the other in Pi5, because I was only executing power off on Pi4/5 and KrakenSDR by deconnecting the power cable. I had to reburn the two images. My call can be closed.