Duplicate bookings should not create for single work order

Concern:

When dispatcher creates a booking in Daily view, if the resource already had a booking, the booking is split into 2 bookings which requires dispatcher to update the booking (by right click the booking > Edit > edit the time). Initially when dispatcher creates a booking in Daily view, there is no option to set the time of the booking and the booking will be created with start time = resource’s start time, which leads to the scenario.

The goal is to prevent multiple bookings from being created for a single work order when customer's scheduler drags and drops it on the schedule board. 

Issue Details:

Duplicate booking records are generated for a Work Order, all having the same "Created On" date, whenever the Scheduler drags and drops the Work Order on the schedule board.