WordPress fix No confirmation for permanent deleting media

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No confirmation for permanent deleting media, by jghvdheuvel

When I try to delete an imported picture from the media library, It doesn’t work.
Previous when I tried to delete an image, I got a confirmation message. I guess I disabled that message somewhere on the way… however, I cannot delete any image anymore.
How can I fix this? Does anybody have the answer for me where I can reactivate this confirmation message?

Thanks in advance.

No confirmation for permanent deleting media