Centos 7.1, Plesk 12.0.8, trying to upgrade "in-place" to 12.5. The system has an IPv4 and IPv6 address. Both were in use before the initial 12.0.8 installation was done. There have never been any problems at all with these addresses. In "Tools & Settings"->"IP addresses" both addresses are present.
Symptom: The pre-upgrade check fails with "IP address registered in Plesk is invalid or broken".
Following KB article 122545 the addresses are re-read. But there is not "repair" option anywhere (the KB article says one should click "repair" after re-reading the addresses). So even after following KB 122545 the problem still exists. The IP addresses that are clearly available on the system and have always been the same even before the first Plesk version was installed AND are also listed in the Plesk admin panel are not recognized by the pre-upgrade check.
How can the issue be solved?
Symptom: The pre-upgrade check fails with "IP address registered in Plesk is invalid or broken".
Following KB article 122545 the addresses are re-read. But there is not "repair" option anywhere (the KB article says one should click "repair" after re-reading the addresses). So even after following KB 122545 the problem still exists. The IP addresses that are clearly available on the system and have always been the same even before the first Plesk version was installed AND are also listed in the Plesk admin panel are not recognized by the pre-upgrade check.
How can the issue be solved?