When I try to use the tag R2D2 I get the error:

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You are attempting to create the tag [r2-d2]; however the tag [r2-d2] already exists! If you think this new tag should be allowed, raise it on meta

First of all, I'm not trying to use the hyphenated tag. I'm just trying to use R2D2.

Second - when I try to use the hyphenated tag - I get the same error!

My question is: Why can't I use the R2D2 tag?

  • Are you saying this site has tags that are specifically disallowed?
    – hawkeye
    Commented Dec 28, 2015 at 6:26

2 Answers 2


Technically, you should be able to use this tag. It's been added to the system and shows up in the tag list. Specifically, exists as a tag and is a synonym that should automatically remap to .

I have no idea why the site won't let you use it. I suspect the combination of having a tag synonym but not being on any questions is confusing the software somehow.

The good news is you shouldn't be using it. It looks like the tag has been cleaned out -- removed from all questions -- in the hopes that it would fade into obscurity. It's a bad tag; character tags in general aren't something we like to encourage.

  • Currently, r2-d2 has no synonyms, which makes this answer not completely correct.
    – SQB
    Commented Jun 21, 2017 at 7:27

What Jake Gould said is correct, there should be no need for such a specfic tag.

However, I think the system sees r2d2 and r2-d2 as the same, as far as I know. It will prevent duplicates based on this.

  • r2d2 is listed as a synonym for r2-d2 so the system clearly knows they're different...
    – KutuluMike
    Commented Dec 28, 2015 at 12:51
  • 1
    @MikeEdenfield I think it could be a glitch, where it thinks two conflicting things at once.
    – AncientSwordRage Mod
    Commented Dec 28, 2015 at 20:18

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