Ensure that "You-Know-Who" is not present in marketplace directory during prerequisites checks for GLPI <= 10.0.5, but disable this check in GLPI >= 10.0.6.
Remove checks done only on GLPI < 9.2 (!method_exists('Plugin', 'checkVersions') is always false now).
oldname
property.!method_exists('Plugin', 'checkVersions')
is always false now).