collection can't be uploaded again when rejected and deleted

Preconditions

No collections in hub (this is only relevant for step 6)

Steps to reproduce

1-Login with admin

2-Go to collections -> namespaces and create 'amazon' namespace

3-Upload collection attached in this ticket (amazon-aws-1.5.0.tar.gz)

4-Go to collections -> approval and reject it.

5-Go to repositories -> rejected -> collection versions tab and remove it.

6-Make this call to make sure collection is gone: count 0 should be returned

GET http://localhost:5001/pulp_ansible/galaxy/default/api/v3/plugin/ansible/search/collection-versions/

7-Go to amazon namespace and try to upload amazon-aws-1.5.0.tar.gz

Expected test result

Artifact is uploaded (appears in Approval screen)

Actual test result

"Artifact already exists" message.

Artifact can't be uploaded