My late mother’s number is saved under “mumma” and it’s been reassigned for years

I know it's not hers anymore. Someone else has had that number for a while. I know this.

But I've never been able to delete the contact. And sometimes the new owner gets a delivery text or a wrong-number call, and my phone lights up with "Mumma calling."

For exactly one second, before my brain catches up and reads the actual message, my heart does something it has no business doing anymore. Just one second of her being alive again. Then it's gone. I still can't bring myself to remove it.