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Regression inf9a44cc0fa. Now that ManyToManyField is no longer concrete the decision of whether or not it should be altered, which is also relied on by field renaming, should take into consideration name changes even if it doesn't have a column associated with it, as auto-created many-to-many relationship table names are a base of it. Note that there is room for optimization here where a rename can be entirely avoided if ManyToManyField.db_table remains stable between .name changes, just like we do with Field.db_column remaining stable, but since this is a regression and meant to be backported the current patch focuses on correctness over further improvements. Thanks Josik for the report. Co-authored-by: Simon Charette <charette.s@gmail.com> Backport of6cc1231285from main.
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