I'm also getting this same error was on 5.3.12 when it started updated to 5.3.13 both mono and dotnet are not working with the Error
Logged: 10/17/2020 13:12:50
Level: Warning
Category: Feed
Message: A 500 error occurred in lcc-registry: Move failed. blobs/sha256/96a20c710d154a49eff959c842039d3969db46ef3904cfdf9a558f17ebcf2bee already exists.
Details: URL: http://[URL]/v2/[Registry]/library/[Image]/blobs/uploads/6469c2a2-b41c-459e-8fb5-0d63d2f63c4a?digest=sha256:96a20c710d154a49eff959c842039d3969db46ef3904cfdf9a558f17ebcf2bee
Referrer: (not set)
User: Admin
User Agent: docker/19.03.8 go/go1.12.17 git-commit/afacb8b kernel/3.10.0-957.el7.x86_64 os/linux arch/amd64 UpstreamClient(Docker-Client/19.03.6 \(linux\))
Stack trace:
Please see error messages above
also checked the directory and the quoted files doesn't exisit