vzlicupdate utility fails to update product key:
# vzlicupdate Start update for license VZSRV... KA server can't update this license - Incorrect product version format.
File containing product version,
/etc/parallels-release was modified:
# cat /etc/parallels-release Red Hat Enterprise Linux Server release 6.5
vzlicupdate utility parses the file, and expects to see a certain pattern matching Parallels product version. Since content didn't match, utility aborted execution.
Make sure correct version is entered into the version file.
Correct version can be retrieved using
prlsrvctl info command:
# prlsrvctl info | grep OS OS: Parallels Cloud Server 6.0.7 (2201) (2.6.32-042stab092.3)
File should be formed like that:
# cat /etc/parallels-release Parallels Cloud Server 6.0.7 (2201)