New Installation unable to import PowerGrades

I have just completed a fresh clean install of OS and all software, machine runs like a dream!

Prior to wiping the Mac I exported the Resolve DB and created a bootable clone of the old machine so I still have access to it's previous state.

I now have two disc databases, the new one contains about 3 projects. I can launch projects from the old database and export/import to the new database if I need to revise jobs.

However, I am unable to import power grades too the new database via the gallery, when attempted I receive this message:

Failed to copy still: Failed to copy physical stills from database loacalatabaseegacy to database Local Database


I can launch old project and export stills/powergrades and then reimport them but this is obviously very tedious - I have a lot of separate 'look' galleries totalling over 100 powergrades and most are custom named - information which is lost when exporting stills.

Can anyone help?

Thanks

Resolve 14.3.0.014

macOS 10.13.4
iMac Retina 5K, 27" Late 2015
4Ghz i7, 32GB
AMD Radeon R9 M395X 4096 MB

I would export all the PowerGrades as DPX stills and DRX grades to a folder on an external drive, then import those to the new system. PowerGrades exist as part of the user database, so I believe it's outside the project per se. It is difficult to figure out what the PowerGrades are unless you manually name them, because the stills won't have the name of the still (or PowerGrade), but instead only the timeline and event number.

I get around this by embedding the name of the PowerGrade in the still: