Error with images

There is a flaw in the plugin. If one user uploads an image, and another user uploads a file with the same title and format, the image is replaced. If the user deletes the second photo, the first post ends up without a photo, because the file contains the same name

A solution is needed that gives a different title to each upload and checks that there is no file in the same path (rename from repeat.png to repeat (1) .png and so on).
Besides, the plugin is great. Solving this, it gets 100%.