Upgrading a concession

Done it a few times this year with no issues. However I read somewhere they're not letting it be done for this game?

My littlest has his head turned by an easter egg hunt and has decided he doesn't want to do the footy today!! So I may have a spare.

Anyone know the gen on upgrading today?

Got an official answer from ticket office...

Can't for Cat A games any more. When asked why they said there was a lot of trouble after Man united game. Oh well, there'll be an empty seat today where a city fan could be...

Do the ticket office not to do a sale back scheme anymore as mine as my lads are unlikely to be used today unless he can finish work early !

It was me that posted it mate.

My mate (senior concession) has been ill and somebody has been using his ticket since January and upgrading but was told no for today.

Sounds utterly ridiculous to me tbh.