Migration Error: PG::DuplicateTable upgrading to10.8.4

Description

When upgrading the docker container image from gitlab/gitlab-ce:10.6.6-ce.0 to gitlab/gitlab-ce:10.8.4-ce.0, I receive the following error while the database migrations run.

PG::DuplicateTable: ERROR: relation "index_internal_ids_on_usage_and_project_id_old" already exists

Afterwards, the container exists.

I was able to revert to the previous version.