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The migration is almost done, at least the rest should happen in the background. There are still a few technical difference between the old cluster and the new ones, and they are summarized in this issue. Please pay attention to the TL:DR at the end of the comment.
mentioned in commit efe41860
closed
mentioned in commit a9333bd3
mentioned in commit ada74c55
mentioned in commit 84e7051c
mentioned in commit 94e81006