Since system keeps the records of all created bookings, if there are bookings associated with a property, system does not allow property deletion.
In such case, you can Deactivate the property instead.
First, make sure property is disconnected from Zeevou Channels.
a. Go to Channel Manager Config and unmap the property from all the channels.
b. For each channel, click on the key symbol and remove the property.
Second, check the status of below boxes in the property edit page: Allow Direct Booking, Publish On Zeevou Direct, Publish On Here To Help
Third, click on Deactivate Property.
If there has been no booking associated with a property, first you need to delete the associated unit, then unit type, and finally the property can be deleted.