Yes because weekly is usually ahead from stable and you'll be performing a downgrade.Thanks for the answer friend. That is, I shouldn’t be afraid of incompatibility between Weekly and Stable firmware? The main thing is that the firmware is being upgraded? I just read somewhere that when switching from weekly to stable, the full format is required...
If you are still on MIUI 13 weekly the MIUI 14 stable rom will be an upgrade instead.
Do make a good backup but the install should be fine without a data wipe.