singleton issues in SIMS

[Clarabell]

just uploaded the TT from Nova t6 into SIMS.

 

In year 12, I have a block with the GCSE maths resit class and one period of law that needs to be taught out of block. This is creating a singleton issue where the entire year group is now allocated into the GCSE maths class.

 

anyone know how to resolve this? If I click on the number to the right in the model to zero students or one student, it turns red.