==> default: [Librarian] Ruby Version: 2.1.5
==> default: [Librarian] Ruby Platform: x86_64-linux-gnu
==> default: [Librarian] Rubygems Version: 2.6.12
==> default: [Librarian] Librarian Version: 0.6.3
==> default: [Librarian] Librarian Adapter: puppet
==> default: [Librarian] Librarian Adapter Version: 2.2.3
...
==> default: [Librarian] Resolving stahnma-epel (< 2.0.0, >= 1.0.0) <(no source specified)>
==> default: [Librarian] Checking manifests
==> default: [Librarian] Module stahnma-epel found versions: 1.2.2, 1.2.1, 1.2.0, 1.1.1, 1.1.0, 1.0.2, 1.0.1, 1.0.0, 0.1.1, 0.1.0, 0.0.6, 0.0.5, 0.0.3, 0.0.2, 0.0.1
...
==> default: [Librarian] Checking stahnma-epel/0.0.1 <https://forgeapi.puppetlabs.com>
==> default: [Librarian] Conflict between stahnma-epel/0.0.1 <https://forgeapi.puppetlabs.com> and stahnma-epel (< 2.0.0, >= 1.0.0) <(no source specified)>
==> default: [Librarian] Backtracking from stahnma-epel/0.0.1 <https://forgeapi.puppetlabs.com>
==> default: [Librarian] Failed to resolve stahnma-epel (< 2.0.0, >= 1.0.0) <(no source specified)>
==> default: Could not resolve the dependencies.
Problem is that both ckhall/remi and shoekstra/owncloud itself requires stahnma/epel versions that do not overlap.