New answers tagged versioning
One of your content types may have required field, especially default content type "Document". I changed required field to optional and it worked for me.
It is for all items combined in list and library. If you exceed this limit, basic file operations—such as file open or save, delete, and viewing the version history— may not succeed. Please follow this link to get more idea how it effects your sharepoint https://technet.microsoft.com/en-us/library/Cc262813.aspx
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