Duplicate image name error

Hi, i am writing due to an error that is giving me some issues. I can't update my app because i have 3 consistency errors, the displayed errors say "Duplicate image name error". So the images do not have the same name but maybe is because they are very similar (TeamLeader instead of Team_leader). How can i delete one of them? i think that then i will be aple to update the entire app.   Many thanks in advance
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