I never have heard of this rule. At least I would expect an hint in the logs that salt versions are incompatible if there are dependencies.
Von: Victor Zhestkov [mailto:Victor.Zhestkov@suse.com] Gesendet: Freitag, 23. Juli 2021 15:19
I suppose your server running salt-master 3000 before. It's not possible to handle newer minion version with old master.