Content type disappears in content list I created a taxonomy with the same name as a content type. Now the list shows with no content type on the nodes with that type. I have since renamed the taxonomy, but there is still an issue.
When trying to edit the node from the admin menu I get the following error:

Notice: Undefined index: case_studies_node_form in drupal_retrieve_form() (line 750 of C:\wamp\www\ppi\includes\form.inc).
Warning: call_user_func_array() expects parameter 1 to be a valid callback, function 'case_studies_node_form' not found or invalid function name in drupal_retrieve_form() (line 785 of C:\wamp\www\ppi\includes\form.inc).

I checked the database and the nodes have the correct type in the content table, and the content types table still has the &quot;Case Studies&quot; type.
Suggestions:


Make sure the module handling custom node type exists and is enabled.

Based on case_studies_node_form callback, it's most likely case_studies module.

If you don't know type of the node, you can load it using drush, e.g.

drush ev "var_dump(node_load(123));"

Make sure the module which handles custom node type defines hook_node_info() in its .module file.
Clear caches (drush cc all, restart Memcached/Redis if present).