some days ago, I created a content type "message" (based on article) which uploads a pdf-Files in the frontend form. This worked just fine. Then I created a new content type "storeage", by copying the "message" content type using the batch tool of seblod. This worked fine once or twice. But suddenly I get an error message, when saving contents either by messager or by storage. The message is: error 1062. Duplicate entry '0' for key primary. The content nevertheless does exist, but not only once but twice. The first is ok, the second is without created-date, without author and without language.
I dont remember exactly: maybe I created this content type "storage" first, then deleted it, and later created again.
Does anyone has a idea what to do?
Do I have to rebuild this content types? Is there a problem with copying content types by using the batch feature?