Do nothing if release exists

.gitlab-ci.yml

@@ -48,7 +48,7 @@ release_job:
         - python setup.py sdist
         - TWINE_PASSWORD=${CI_JOB_TOKEN}
           TWINE_USERNAME=gitlab-ci-token
-          python -m twine upload --verbose --repository-url
+          python -m twine upload --skip-existing --verbose --repository-url
           ${CI_API_V4_URL}/projects/${CI_PROJECT_ID}/packages/pypi dist/*
     release:
         tag_name: '$CI_COMMIT_TAG'