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Unknown brush format when reloading a backup brush file

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When I came to restore my brushes I got an 'unknown brush format' error report on the attached file. Does any computer wizard here know why? I have used Time Machine and gone back through several date versions with the same result. All my other backup brush files loaded back in just fine.

I amusing APV2 latest and Monterey latest.


Many thanks for looking into this for me if you can.

1 My odd sketchers.afbrushes

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The file is only 72 bytes so it seems to be severely corrupted. Maybe try going much farther back in your Time Machine backups if you can to find a larger version that is not corrupted.

All 3 1.10.6, & all 3 V2.03 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7
Affinity Photo 
1.10.6; Affinity Designer 1.10.6; & all 3 V2 apps for iPad; 6th Generation iPad 32 GB; Apple Pencil; iPadOS 15.7

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