Description of problem:
After importing content from another Satellite, content views with the option "import only" are created. If one tries do sync the entire library to a capsule or promote one of those content views to a LCE that is configured to sync to a capsule, the sync will fail with 404 errors for that content view.

Version-Release number of selected component (if applicable):
6.10.1

How reproducible:


Steps to Reproduce:
1. Import a content view
2. Promote the content view just imported to a LCE that will sync to a capsule
3. Launch the capsule sync

Actual results:
Task fails with following error:

Errors:
404, message='Not Found', url=URL('https://bombsat610.usersys.redhat.com/pulp/content/test_joniel/TO_SYNC/RHEL8_Kickstart/content/dist/rhel8/8.5/x86_64/baseos/kickstart')Could not lookup a publication_href for repo 188404, message='Not Found', url=URL('https://bombsat610.usersys.redhat.com/pulp/content/test_joniel/TO_SYNC/RHEL8_Kickstart/content/dist/rhel8/8.5/x86_64/appstream/kickstart')Could not lookup a publication_href for repo 189

Expected results:
Sync should work.

If this type of content view is not supposed to be synced, there should be something not allowing it to even try to sync (and proper documentation about it).

Additional info:

Creating a regular content view with the repositories provided by the imported content view and syncing works as expected.