If you used Campus Pack tools (blog/podcast/private journal/wiki) in BOLT, and copied an old course into a new one, any links to those tools will not be functional in your new course. 

Please visit https://bloomuimdc.freshdesk.com/support/solutions/articles/35000134469-how-do-i-edit-reorder-move-or-delete-content-/preview#Delete to find out how to delete the broken link content items from your course.

For more information please see: