It is analogous to the ‘Edit’ tag, but is only used when the artist themselves have edited their own work to make a new version of an image.
This way, when an artist makes a series of images, each of which is edited to be slightly different from the original image, the edits are tagged “alternate version”. This way if people do not want to see multiple versions of the same image, they filter the ‘alternate version’ tag and then only see the original.
Periodically artists will make dozens of edits of their own work. With this tag, people can avoid seeing the edits if they choose.
This tag is already in use on nearly fifty thousand images, and is being used by more than a thousand differnt people to watch for, or to filter, images that are the artist’s edits of their own works.
So, the tag will not be changed.
It appears that you are using it for some other purpose, as the result of an entirely different problem.
It appears that the real source of the confusion on your uploads is that you are tagging your uploads both as an OC and as Fluttershy - they can’t be both. If you are truly uploading an OC, then you should not also be tagging the character with the name of the character your OC is based on. That your OC is an ‘alternate version of Fluttershy in an alternate universe’ who also has an entirely different name, then there’s no reason to tag her ‘history’ or the source of the inspiration for your OC - you should just tag your OC.
I’ll send you a PM to help figure out how your OC should be tagged to resolve the issues you’ve run into with your uploads. We don’t need to redefine tags, we just need to be using the correct tags that already exist.