Poetry update refuses to update my lockfile when I use private repository

[alwibowo]

Hello I am not sure if anyone has encountered this issue before. But, poetry update refuses to update my lockfile when I use a private repository.

Context

My current pyproject.toml relies on commonly used packages that can be found in PyPI and and a private repository on packagecloud. I have specified the sources e.g.

[[tool.poetry.source]]
name = "some-package"
url = "https://packagecloud.io/some-package/stable/pypi/simple"
priority = "supplemental"

[[tool.poetry.source]]
name = "PyPI"
priority = "primary"

As far as I understand it, poetry will try to look for the common packages in pypi before installing from the private repository in packagecloud. When there is no lockfile, I can define the version of the private package however I want and things will work fine. But once a lockfile is generated and I try to update the version on pyproject.toml after which I use poetry update, I have the following error:

Because my-project depends on some-package (2.0.2) which doesn't match any versions, version solving failed.