CUPS No longer Accepting Custom Printer Options Programmatically

Hello. I do not know if you are the correct person to reach, but I hope you can help me.

I have recently encountered a new issue with CUPS after a recent package update on my raspberry pi 5.

I am working on a project which involves a thermal printer and custom UI which can print pdf files. I am handling custom print options programmatically in python, but they suddenly stopped working.

I made the mistake of updating the packages on my raspberry pi, and now any custom options which are sent programmatically are no longer registered. For example, I have python code which imports cups (pycups), and in the cups.Connection().printFiles() method, there is a parameter for options where I could override certain settings specific to the printer, like Darkness, media size, or margins.

Setting these options used to work, but now they do nothing at all. I am not an experienced programmer, and I have put many hours into this project.

Looking through the logs I found a reference to this website, but I don't understand what most of it means or if it is relevant. Here are a couple lines from the log:

"Queue -PM-241-BT uses a printer driver, which is deprecated."

"Printer drivers are deprecated and will stop working in a future version of CUPS. See https://github.com/OpenPrinting/cups/issues/103"

If you are able to help me resolve this issue, I would greatly appreciate it!

Thank you.

Alexander