Commons currently allows users to add multiple depict statements with the same value.
This is allowed in the native Commons interface, as well as through tools like ISA (ISA should be rejecting these edits though! see
T265821)

ISA does not show the duplicate statements when an image loads, which means they can't be spotted and fixed through the tool.
It also causes another bug - clicking the "cancel" button after making any changes makes the duplicate statements show up, but with "undefined" as the label.

ISA should be able to view all statements, including duplicates. This will make the cancel "bug" go away.