AdminSupportDataCollector page for our Znuny instance displays the following error for one of the custom packages:

Some packages are not allowed for the current framework version.

The package in question: https://gerrit.wikimedia.org/r/plugins/gitiles/operations/software/otrs/+/refs/heads/master/packages/WikimediaTemplates/WikimediaTemplates.sopm has the following Framework setting:

<Framework>6.0.x</Framework>

We are currently on version 6.5.8 so there is a difference here but based on https://doc.znuny.org/znuny_lts/developer/extending/package-building.html the framework setting is defined as "minimum framework level" so this combination should theoretically still be fine, unless the minor version has to match.