You have entered a subtotal condition for a subtotal that uses something other than a date or Boolean field as the sort and group by field. Your subtotal does not require a condition.
Mnakwenda hali jumla ndogo ya jumla ndogo ambayo inatumia kitu kingine zaidi ya tarehe au shamba Boolean kama aina na kundi na shamba. Subtotal yako hauhitaji hali hiyo.