iTunes keeps resetting my iPhone auto backup setting from This Computer to iCloud

hi everyone. i just got a new iPhone and am getting it set up to sync with iTunes. i prefer backing up to my Mac instead of iCloud. i am having an issue with iTunes where it keeps resetting the "Automatically Back Up" setting to "iCloud" instead of "This computer". every time i change the setting to "This computer", and then hit "Apply", iTunes sets it back to "iCloud". i have the iCloud backup setting on my iPhone turned off.

My Old mac was set to automatically back up to "This computer" and iTunes remembered it just fine. i'm not sure why it keeps resetting to iCloud for my new phone. iTunes lets me back up manually with no issues, by clicking the "Back Up Now" button. it just won't save the automatic back up setting for some reason.