Central Locking Issue

[Maggiore]

I currently have a Corsa

It has full central locking, however it had an issue with the back passenger door (its a 5 door), whereby it stopped locking remotely.

All of a sudden, it started working again, however it is completely out of sync with the other doors, i.e. when the other lock, that one opens etc.

Anyone know of a way to reset this or resolve the issue?

Thanks