pipenv fails to generate lock file for flask 2.0.1 and 2.1.1 even when using tilde operator

[vishal180618]

Problem: even though I've used ~ in dependency and both flask versions are changed in minor versions so it should be able to generate Pipfile.lock using pipenv lock.

difference bw the pipfile.lock generated individually for both flask versions: https://www.diffchecker.com/GngEExsR

Error:

CRITICAL:pipenv.patched.notpip._internal.resolution.resolvelib.factory:Cannot install flask~=2.0.1 and flask~=2.1.1 because these package versions have conflicting dependencies.

Pipfile:

[[source]]
url = "https://pypi.org/simple"
verify_ssl = true
name = "pypi"

[packages]
flask = "~=2.0.1"
abcdef = {ref = "1.1.0", git = "https://***@github.com/abcdef-Utilities.git"}

[dev-packages]


[requires]
python_version = "3.7"

abcdef has flask ~=2.1.1 in setup.py

[matteius]

Linking to the issue report: #5428

I assume something broke the tilde operator -- will prioritize looking into this.