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Duplicate automated builds in Dockerhub

Whenever I push to our Github repository, I got always two build run for the same revision. It started to happen recenly. I have several images to build from the same branch (not tag) (different for different python versions) and they appear twice now every time we push to the branch.

https://hub.docker.com/repository/docker/apache/airflow/timeline

That’s what’s going on - same hash, same branch, same image tag: