Deleted reminders keep popping up on iPhone after setting up new device.

So I recently purchased a new phone (iPhone 14). I had some unread reminders (from reminders app) on my old phone (iPhone 13). After transferring all of my info onto the new phone (iPhone 14), I tried to delete these reminders. However, they continue to pop up after deletion. I’ve turned iCloud on and off. At which point another set of these reminders appear. (So if I had five reminders I couldn’t clear, then I would have 10 reminders I couldn’t clear.) I’ve tried to change the location, name, date, time. (Doesn’t move and all info stays the same) I’ve tried to mark as complete. (Doesn’t work) I’ve deleted the app. I’ve reinstalled it. (Still there) Tried deleting the list itself, which does not work at all. Does anybody have any solutions to this? Thanks.