As a security feature it is not possible to move documents between teams.
Teams usually include different teammates with access to different documents. If you move a document from one team it would leave room for errors of shairing documents with wrong members. Since Konfident has a very simple drag-and-drop interface it would be too easy to move a document to another team by mistake.
If you need to share the document with another team you must first download the document, and then upload it again to the other team, minimising the risk of making a simple mistake.