This came up in #4488
Kojid already has some checks in readyForTask(), and it might be reasonable to add this there
readyForTask()
Metadata Update from @mikem: - Custom field Size adjusted to None - Issue set to the milestone: 1.37
This issue has been migrated to Fedora Forge: https://forge.fedoraproject.org/koji/koji/issues/4489
Please continue any further discussion there.