You can edit the address with nmcli. I did something similar with my two Pi setups that each wanted to use 10.42.0.1 for their hotspots.

nmcli connection modify <Hotspot> ipv4.address <XX.XX.X.X/24>
nmcli connection up Hotspot

For my case, My Hotspot SSID/Connection name was AdventurePi (named after its use on a Star Adventurer.) So the command above with my details looked like this.
nmcli connection modify AdventurePi IPv4.address 10.42.1.1/24
nmcli connection up Hotspot

References:

It now creates a hotspot with an IP address on 10.42.1.1 that will not conflict with the other system with an address at 10.42.0.1

References:
NetworkManager documentation
NetworkManager ManPages
Gnome Help Page

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