Good catch, thanks. However, mate-desktop should be the master since that is unambiguous (the word mate has many meanings).
I have now made mate a synonym of mate-desktop and have merged the two so that all questions that were tagged [mate] are now tagged [mate-desktop].
There is absolutely nothing wrong with your question! Why would you think anything was wrong with it? Merging is done to improve the site, it should not be perceived as an attack.
Which question is older and which newer has nothing to do with it. In this particular case, the new question had more and better answers. I therefore chose to merge in this ...