I'm experiencing an issue that in my programatically created SharePoint List, if I add two items with the same "Title" field, it tells me the following error:
Sorry, something went wrong A configuration entry already exists with this key. Please choose a different key.
This does not meet our requirements, since the Title field is displayed on a content query web part, in various countries, and may share the same name.
Is there anything that can be added to the ListInstance on creation, or configured post list creation, to allow these items in multiples?
I checked the Schema.xml associated with the list and found no direct unique/index columns specified. Also, we removed all links to indexed columns via the List Settings. We are using SharePoint 2013.