SymptomsAn IP has been removed from the container but if I go to Server > IP Addresses in Plesk control panel the IP address is still shown in the list and is marked as missing in the system.
CausePlesk 9.5.4 and earlier does not allow to add/remove IP addresses from Plesk interface when Plesk is installed inside container.
This ability had been introduced in Plesk 10. However, removing existing IP address from Plesk interface will not affect system settings if Plesk is installed inside container: upon next refresh of list of IP addresses, removed IP address will appear in the list again.
ResolutionAt first, make sure that no domains are hosted on this IP and this IP is not added into any client's IP pool. Then try to remove it from root console with command (replace IP_ADDRESS with the real IP):
/usr/local/psa/bin/ipmanage.sh -r IP_ADDRESS