Hi K P,
Uncheck the previous day indicator for breaks in V_T550P for 20:00 - 20:45 (Unpaid). Since the break timings belong to the same day shift, you don't need to assign previous day indicator.
Let us say that you had a 15 mins break from 00:00 - 00:15. In this case, you will be assigning previous day indicator to break to assign this break to the shift of previous date.
You may also refer to the below document on Public Holiday Calendar and WSRs.
Public Holiday Calendar and Work Schedule Rules
Thanks and regards,
Vivek Barnwal