One of my project from recent times I was worked on content hub to manage the content types in SharePoint. While changing the content type name, I got an error saying that “The content type is in use” as shown the image below.
I have checked all the content types in current site, I haven’t seen any content type with the current name. By checking few blogs like mavention and sympmarc I got the reasons for this error.
There many reasons for this issue as listed below,
Content type still exists in Site: Even we can’t see the content type in SharePoint content type gallery, it may exists in Recycle Bin (Site Recycle Bin or Site collection Recycle Bin). We have to remove the content type from Recycle Bin too. To remove the content type from Site Collection Recycle Bin, we need to have Site Collection privileges on Site Collection.
Other users might have associated anywhere? There is another chance that other users might have associated with the content type that we can’t see. We can see this behavior in SharePoint document libraries. We can check this by navigating to SharePoint Library settings and click on Manage Check out files. We can see the list of items belongs to other users. If it ok, take the owner ship of the items and check-in them.
Minor Versions: We have one more possibility that there are some items may checked-in with minor versions in the List/Library. We have to check the appropriate items and need to publish the items with major versions.
This may helps.