Today I deployed a custom SharePoint column and list definition to our productive systems and added some extra columns to test some functionality. I then wanted to delete them again. Boom: ASP.net Error page. ULS told me: "Cannot complete this action. Please try again.". Suffice to say: Trying again did not help. Fired up the … Continue reading SharePoint: Why won’t you let me delete a column? A case of “Cannot complete this action.” →