When entering a new asset in Govern, if there is existing asset with the same Key the error message below will be displayed, the creation will fail, and all information put in will be lost.

I would like to suggest that when a new term is determined to be a duplicate by Key, the entry form should remain the active screen and the relevant Key field should be highlighted and noted with the error. This would allow users the opportunity to change the Key, or at least copy the information put in so it is not lost completely.