Here we will how we can resolve the below issue which comes when we try to delete a content type from the site collection. A content type is an entity that uses site columns to define a schema of fields for an item in a list or a document in a document library. The content types are defined outside the scope of any list or document library. A content type defines a field collection that is reusable across multiple lists or multiple document libraries. You can update a content type to make the changes available in all list and libraries.
If you are new to content type, you can check the SharePoint Content type article: Content type in SharePoint 2016 tutorial
When we try to delete a particular content type, we got the below error:
Sorry, something went wrong.
Another site or list is still using this content type. If you would still like to delete it please remove the content type from all sites and lists and then try again.
Here are below things you need to do in order to delete the content type from the site collection.
– Delete the content type from the lists or libraries used in the site collection. Make sure to delete from each sites and sub sites too.
– Once you delete from the lists or libraries, we have to delete from the recycle bin too.
To delete from recycle bin, go to settings -> Site settings -> Then select Recycle bin from Site Collection Administration.(_layouts/15/AdminRecycleBin.aspx?view=5)
Once you delete from the Recycle Bin, we need to delete from the “Second-stage recycle bin.” Click on the “Second-stage recycle bin” link like below:
Once deleted from the Second stage recycle bin, we will be able to delete the content type successfully.