Of course in the end the pairings don't affect the overall story so if you want to retcon it in your head then it could be easy to do so.
[@Magic Nova](/images/2874174#comment_10109966)
We must stand firm!
Although I'm not too worried ||(no it won't be the end of the world to me if Sunnyhitch becomes non-canon)|| because Hitch probably has many casual dates with mares. So this is probably nothing serious. Just giving Primrose a little schotance at romance.