How do I manage message retention settings in iCloud for iPhone and iPad?

I have a iPhone and an iPad.

On my iPhone for message retention I have keep forever.

On My iPad ( which I am trying to reclaim space) I enabled the "keep for 1 year" suggestion, but can't seem to turn it off.

Which settings takes precedence in iCloud ?

I am logged into t messages on my iPhone, but have not logged back in on my iPad, for fear of losing the messages from over a year ago.