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:wampwwwppiincludesform.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:wampwwwppiincludesform.inc).

I checked the database and the nodes have the correct type in the content table, and the content types table still has the "Case Studies" type.

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