When having to migrate hugh numbers of IP addresses on Plesk, here is a way to manipulate the database to do it without having to use the panel to do them one at a time.

mysql -uadmin -p`cat /etc/psa/.psa.shadow` psa
mysql> SELECT * FROM IP_Addresses;

mysql> UPDATE Repository SET component_id = [new ip id] WHERE component_id = [old ip id];

mysql> UPDATE hosting SET ip_address_id = [new ip id] WHERE ip_address_id = [old ip id];