When the stadium build was announced and confirmed, Jakeman's were not confirmed as title sponsors (although they did still have the naming rights for York Street, as The Jakemans Stadium). It came later, and have been the named sponsor since the first match. I guess it's similar to Arsenal, where it was originally in the database as Ashburton Grove before Emirates stepped in.
I just follow guidelines we've used for a while, and it's never come up before - thoughts @Gingerbread Man? In the meantime, you can use the editor on the PC version to rename it if you wish.