'LinkPlugin' is already registered.

[hapesurya]

Dear All,

I faced an error when installing djangocms-link with pip install djangocms-link command as I wrote below:

raise PluginAlreadyRegistered(
cms.exceptions.PluginAlreadyRegistered: Cannot register <class 'djangocms_link.cms_plugins.LinkPlugin'>, a plugin with this name ('LinkPlugin') is already registered.

And this LinkPlugin class comes from cms_plugins.py.

===

I am currently just following this page:

https://docs.django-cms.org/en/latest/how_to/install.html#miscellaneous-plugins

to install miscellaneous plugins. Below is my pip list:

Package Version

---

appdirs 1.4.4
asgiref 3.7.2
certifi 2023.11.17
charset-normalizer 3.3.2
cssselect2 0.7.0
Django 4.2.8
django-appconf 1.0.6
django-classy-tags 4.1.0
django-cms 3.11.4
django-entangled 0.5.4
django-filer 3.1.1
django-formtools 2.4.1
django-parler 2.3
django-polymorphic 3.1.0
django-sekizai 4.1.0
django-select2 8.1.2
django-treebeard 4.7
djangocms-admin-style 3.2.6
djangocms-attributes-field 3.0.0
djangocms-file 3.0.1
djangocms-frontend 1.2.0
djangocms-googlemap 2.2.0
djangocms-icon 2.1.0
djangocms-link 3.1.1
djangocms-picture 4.1.1
djangocms-snippet 3.1.1
djangocms-style 3.1.0
djangocms-text-ckeditor 5.1.5
djangocms-video 3.1.0
easy-thumbnails 2.8.5
fake-useragent 1.4.0
html5lib 1.1
idna 3.6
iniconfig 2.0.0
lxml 4.9.3
markdown-it-py 3.0.0
marshmallow 3.20.1
mdurl 0.1.2
packaging 23.2
Pillow 10.1.0
pip 23.3.1
pipdate 0.5.6
pluggy 1.3.0
Pygments 2.17.2
pytest 7.4.3
python-dotenv 1.0.0
reportlab 4.0.7
requests 2.31.0
rich 13.7.0
setuptools 66.1.1
six 1.16.0
sqlparse 0.4.4
svglib 1.5.1
termcolor 2.4.0
tinycss2 1.2.1
urllib3 2.1.0
webencodings 0.5.1

Do you happen to know how to solve this?

Thank you.

[aacimov]

I've accidentally seen your post but the problem is you have djangocms_link and djangocms_frontend installed.

djangocms_frontend package is used in the new Django CMS v4, you have Django CMS 3.11.4 installed.

Option 1

1. Remove djangocms_frontend from your installed apps (and do a pip uninstall djangocms_frontend)
2. Keep using Django CMS v3

Option 2

1. Remove djangocms_link (for LinkPlugin I know for sure it doesn't work with Django CMS v4) and maybe some other packages that are not compatible with the new CMS v4
2. Upgrade to django-cms==4.1.0
3. Add djangocms_frontend.contrib.link and djangocms_frontend.contrib.image to your INSTALLED_APPS

NOTE: If you already have your database loaded and filled, Option 1 is easier, Django CMS v4 introduced lots of new dependencies and you will have to start from scratch or migrate your data. Be sure to read the docs on how to install CMS v4 from the official documentation's page.

I hope it helped.

[hapesurya]

Love this, thanks for your explanation.