ImportError: cannot import name PageAddForm after adding cms_themes to APPS

[mike-pt]

/django-cms/env/lib/python2.7/site-packages/cms_themes/admin.py", line 17, in
from cms.admin.forms import PageAddForm,PageForm
ImportError: cannot import name PageAddForm

[mike-pt]

wonder if it the same issue as here: https://github.com/stefanfoulis/cmsplugin-filer/issues/86

[sraddhanjali]

[alanlun516]

Same issue here.
I updated my "models.py" file from my "cmsplugin-filer-image" package against mike-pt's suggestion.
The error still occurs.

[tonjo]

Very old...
Is this line in admin.py really necessary?

from cms.admin.forms import PageAddForm,PageForm

Seems like the two classes are not used in the file.
Commenting that line it seems to work.