Bugfix - adding external modules was broken (bug introduced in #1635) (bp #1649) (#1650)

* Bugfix - adding external modules was broken (#1649)


(cherry picked from commit d21fe713

)

* Remove test because not backportable

* Remove extra space

Co-authored-by: Adam Izraelevitz <azidar@gmail.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>