How do I delete this unwanted POI?

I've just installed UK&ROI 970 7466 on my TT Rider 2.

When I press 'Plan Route' and then 'Point Of Interest' on my device a single unwanted POI appears (a Co-op store) alongside the other usual 'POI near...' options.

I then go to 'Manage POI's' and the unwanted POI is nowhere to be seen.

I then connect my device to my pc and directly access the 'poi' folder. The unwanted POI isn't there.

Has anybody any suggestion as to how I locate/delete this POI?

Yours hopefully,
HV