I have upgraded my site from Drupal 6 to Drupal 7. Most of my content is in place and all fields migrated successfully.

I have noticed this error: Notice: Constant CONTENT_DB_STORAGE_PER_CONTENT_TYPE already defined in include_once() (line 9 of /home/***/public_html/***/sites/all/modules/cck/content.module).

I can't uninstall Drupal 6 cck modules either... Can someone help?