Hi Daniel,
Have you split the batch into two vessels (moving some volume from one to another while leaving some volume behind)? This can be done and Breww will prompt for whether you’d like this to be two batches or remain as part of the same batch. I have attached a screenshot below for your reference.
If you split into two batches, then you can change the beer of the second batch. Alternatively, it may be worth looking at “Derived beers” as this might work well for you, depending on how different the beers are. I have included some information on ‘Derived beers’ below for you.
I hope that helps.
Cheers,
Joe