XF 1.4 Cannot change a prefix color?


In my forum I gave my users the ability to add a prefix to their discussion:

Everything works fine EXCEPT I am not able to change the color of the Advertising prefix. I can change all the other prefix colors through ACP > Applications > Thread Prefixes But every time I try to change the color of the Advertising prefix and click save, it doesn't actually save. All the other prefixes are fine.


Change to blue:

Click Save, and then it goes right back to orange when I reload the page.

It does not matter which color I select either.

Here is a gif:
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