Already imported photos showing as new photos when importing from iPhone
A couple of months ago Photos on my Mac suddenly labelled several hundred photos on iPhone as new even though they have already been imported.
The number varies, but it's the same photos going back over 6-7 years.
Any ideas how to mark these as imported so it doesn't try and reimport them every time?
iMac 27″ 5K, macOS 10.15