Modules installed with pip don't work after Bookworm upgrade

I recently upgraded to Debian Bookworm from Bullseye. I am aware that installation of python packages requires a different method as compared to pip install . Therefore, I install new python packages using pipx which works well. **Question:** The packages that have already been installed using pip don't work as they were working before. For example, I had installed pdfCropMargins using pip and have used it extensively before upgrading to Bookworm. After the upgrade, I get the following error:

pdf-crop-margins -a 5 pgfmanual.pdf 
Traceback (most recent call last):
  File "/home/vrgovinda/.local/bin/pdf-crop-margins", line 5, in 
    from pdfCropMargins.pdfCropMargins import main
ModuleNotFoundError: No module named 'pdfCropMargins'

As per my understanding, I guess that pipx is now managing the python packages and is expecting the modules in some other location. Am I right? If yes, how to resolve this issue? If No, What is the reason for this error and how to resolve this issue? Thanks in advance.