Unable to delete self IP used in HA

Hello,

After making a mistake in the IP used for our HA between 2 F5, we've tried to remove the self IP but an error prevents it : "IP address is part of an active state mirroring".

After looking in the documentation, we should have a "state-mirroring" tab available under "System/High Availability". However we can only see a "Fail-safe" tab. We use 11.5.1 with an evaluation license.

After some tries, we used the command "modify /sys state-mirroring addr" to correct the state-mirroring address with the good IP. Now we still can't remove the incorrect IP due to this error : 01071413:3: Cannot delete IP (192.168.17.21) because it is used by a system unicast address.

Any idea how we could be able to remove this IP ?

Best regards,