Hello,
It looks like this edit created a gap in the Chichester Harbour Area of Natural Beauty - you can see that at https://overpass-turbo.eu/s/1yTs .  I've filled it in so that it follows the former service roads that were deleted https://www.openstreetmap.org/relation/9336138#map=16/50.8012/-0.9654 .  If you know a more correct line here, please do adjust it.
Any questions, please don't hesitate to ask.
Best Regards,
Andy
