This message appears when you try to split or modify a booking, and the new dates or unit overlap with an existing booking in the same unit.
For example, if a Booking is being adjusted to overlap with another Booking , Zeevou will warn you about the conflict.
To proceed, you can either:
Create an Unallocated Booking (so the booking is saved without assigning it to a unit), or
Change the unit or dates to avoid the clash.
This prevents double-booking and ensures smooth operations.