A clashing booking (orange banner) is not a double booking (red banner). Clashing bookings occur when there is inventory available, but the channel manager is not able to place the new booking in the spaces available, under that room type.
Resolving the clash
Open the Grid and go to the clashing dates listed in the banner. Clashing bookings appear overlapping on the same room row.
Change the room: click and drag the booking to an available room on the Grid, or open the booking and select a different room from the Room field, then click Save Booking.
If no equivalent room is available for those dates, this is a double booking (there will be a red banner). You will need to contact our support team and alert the guest. If you need to cancel, see Cancelling a booking.
Following the changes, please double check your Channel Manager to confirm your availability is correct across all connected OTAs.
As a rule of thumb, keep OTA bookings (Booking.com, Expedia, Airbnb, etc.) in the same room type that the guest booked.
Moving a booking to a new room type will not update the guest and OTA, so it could cause a double booking, as a modification from the guest will move it back to the room type they booked.