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History can be deleted but you'd lose the ability to rollback, i.e. import an older version, your stack's state. I'd suggest keeping the last few versions, that you think makes sense for your stack(s).

Also a shameless plug, I wrote a desktop app that I think you'll find useful since you are a self-managed backend user. <http://deskypus.github.io|deskypus.github.io>.