Pulp has already fixed this issue in the 2.5-releases, but the fix isn't present in 2.6.0. Satellite needs to cherry pick this PR  into the composes. The original Pulp issue is BZ 1179463.
Since this issue was entered in Red Hat Bugzilla, the release flag has been
set to ? to ensure that it is properly evaluated for this release.
Actually this is not an issue in 2.6.0. I'm closing this bug. Sat6 should not encounter this issue.