Yesterday, I attempted to change the favicon of the wiki I admin on, the Scribblenauts Wiki. I noticed it was a bit stretched and lacked a transparent background. Using a trusty favicon generator, the same one I used to make the old favicon, I made an updated, improved version. I go to the Theme Designer, go to Wordmark, put my new favicon in, and...nothing. The old favicon stays. It won't be overwritten and I'm not sure why. Can anyone help?

P.S. a similar thing has happened on the Mondaiji-tachi ga Isekai Kara Kuru Sō Desu yo? Wiki, the favicon will not change.