There is an incompatibility between django-cms < 3.8 and django-treebeard 4.5.1, see https://stackoverflow.com/questions/66776994/

Author: fpierfed

requirements.in

@@ -21,7 +21,10 @@ social-auth-core[openidconnect]
 markdown2
 
 # 3.7 DjangoCMS LTS release
+# Please note that django-cms relies on django-treebeard and version 4.5.1 of 
+# that package is incompatible: https://stackoverflow.com/questions/66776994/
 django-cms<3.8
+django-treebeard<4.5.1
 djangocms-admin-style
 djangocms-text-ckeditor
 django-filer

requirements.txt

@@ -6,6 +6,8 @@
 #
 anglicize==0.0.3
     # via -r requirements.in
+appnope==0.1.2
+    # via ipython
 backcall==0.2.0
     # via ipython
 cairocffi==1.2.0
@@ -89,8 +91,10 @@ django-taggit==1.3.0
     # via
     #   -r requirements.in
     #   django-taggit-labels
-django-treebeard==4.5.1
-    # via django-cms
+django-treebeard==4.4
+    # via
+    #   -r requirements.in
+    #   django-cms
 django==2.2.19
     # via
     #   -r requirements.in