Pip install error when version metadata differs from that is in pypi

[K377U]

What did you want to do?

We use git as backend for our pypi server. We set version number in the python package and then read it and put it as tag in git. We then list all tags as versions in the pypi server.

We also include master as -dev0. This is where we have problem with the new resolver.

(Pip version 20.3.1)

When doing

 pip install --pre

we get error

`ERROR: Requested * from git+ssh://*-4.202012101143.dev0 has different version in metadata: '4.202012101143'`

Error is clear but the solution is not. I would prefer not to change anything in the git side. My process is to validate that the package is ok and then tag it to make a release.

Would it be possible either:

Allow different version metadata as long as it is with pre release.

OR

Add some hook to skip this.

[uranusjr]

Duplicate to #9203.