House of Ninja

I'm having trouble exporting my .afphoto file from my iPad Pro Affinity Photo to my Mac version of Affinity Photo. I tap on Save a Copy on the iPad version and it exports to iCloud perfectly. But when I try to open it on my Mac I get this: "Failed to open document The file includes features from a later version of Affinity." iPad is running version 1.6.3.43 Mac is running version 1.5.2 Any help is much appreciated! Thanks