@Akashi Kouma
If you upload a new version, go to the new version and in the menu bar under the tags and source, click the “Report” link, then click “Updating/merging” and you can enter the image ID of the new version. When you click “Report Duplicate” it will go into the queue for folks here who work on duplicates.
If you’d like, you can also report the old one, using the “General reporting” link instead, choose the reason “Other”, and in the text field let us know you’d like it merged (or deleted if you prefer) and include a link to the new image to make sure we merge with the right image.
You can also send me a PM if you’d like, and I will be able to go through your uploads and can probably find it myself … if not I can reply asking for help finding the right images :)