SharePoint V3: Site Features: Error: A duplicate name "Report" was found.

Description:

Unable to activate the "Office SharePoint Server Enterprise Site Features."

The following error is returned, " Error. A duplicate "Report" was found."

Solution:

There was a custom content type on the site collection called, "Report." When the Enterprise Features are enabled, a system generated content type called "Report" is created. Since the custom content type was present, this created a conflict and prevented the Enterprise Features from activating.

A work around to this to rename the existing, custom content type from Report to something different, such as "Report Document."

* Site Actions > Site Settings > Site Content Types > Report > Name, Description, and Group

* Edit Name: e.g. Report Document

* Click OK