Hi Minju,
This is the right place and yes that is a bug! I will patch it for an upcoming release but in the meantime you can easily fix it at your end. You will need to edit the file models.tab which is deep down in the models directory. You can find the right one with:
locate models.tab | grep version2020 |grep z=1
That will turn up something like
path-to-your-installation/models/wolfirekaufman/version2020/constant_density/z=1/models.tab
Edit models.tab , line 11 , 3rd column you will see the typo. Change OI_158 to OI_145.
Restart your notebook kernel (or re-run your script if you are not using notebooks) and the problem should be fixed.
Thank you for using pdrtpy!
best,
Marc