Changing server IP address does not change br0 auxiliary addresses

I'm running Unraid 7.2.0 and after changing server's IP address I see that docker's br0 has not been updated to reflect the change:

docker network inspect br0
[
    {
        "Name": "br0",
        ...
        "IPAM": {
            "Driver": "default",
            "Options": {},
            "Config": [
                {
                    "Subnet": "192.168.100.0/24",
                    "Gateway": "192.168.100.1",
                    "AuxiliaryAddresses": {
                        "server": "192.168.100.11"
                    }
                }
            ]
        },
        ...
    }
]

192.168.100.11 is an old IP, and is not used by the server anymore, however I cannot assign the IP to any container as it's marked as used by docker.

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