I read in the issue
Currently, 1.5, 1.6 and 1.7DEV and have been doing this for a long time but now, possibly related to something new in 1.7DEV I’m getting this error when trying to run the tests in either julia1.5 or 1.6
As I already said above, manifests are specific to a minor version of Julia. You can’t expect to share them across multiple minor versions. That’s a matter of fact and something that is likely not going to be fixed: manifests are for reproducibility with a specific minor Julia version.
For me the issue is that Pkg doesn’t clearly tell what file is causing the issue.