Malformed requirements.txt created

I created my requirements.txt using the following command:

`pipreqs . --force --ignore ".venv"`

I used `--force` because the project has an existing, incomplete requirements.txt, which is how I found pipreqs in the first place.
I used `--ignore ".venv"` because i encountered an error related to this [issue](https://github.com/bndr/pipreqs/issues/214).

The requirements.txt now contains duplicates such as:
...
PyYAML==6.0.2
PyYAML==6.0.2
...

conflicting versions:
...
pywin32=310
pywin32==311

as well as wrong library names:
...
skimage==0.0
...
(should be scikit-image)

I am on windows, using python 3.12.

Start by reproducing the `pipreqs . --force --ignore ".venv"` command on Windows with Python 3.12, focusing on the generated requirements.txt. Investigate how duplicate entries, conflicting versions, and imported names such as `skimage` are produced; done means the output contains one correct, valid requirement for each dependency.

Written by the indexing model from the issue text.