@Lubos, just by accident I realised that I can not undo using history the action of updating an inventory item by uploading an image. The only way of undoing that action is going to the inventory item and “binning” the image and click update again.
Although not a bug it should be classified as an inconsistency as adding and removing images to inventory items should be actions like any other changes in inventory items that should be recorded in history, if only to know whom added such image.