Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: 814
name: THE BIRMINGHAM (LAND AT 1 COURT OAK ROAD, HARBORNE) TPO 1999
tree-preservation-order: undefined
TPO 814
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.962180 52.459779,-1.961865 52.459765,-1.961825 52.459769,-1.961761 52.459802,-1.961739 52.459830,-1.961735 52.459869,-1.961747 52.459893,-1.962100 52.460221,-1.962147 52.459932,-1.962159 52.459926,-1.962180 52.459779)))
point: POINT (-1.961983 52.459929)
notes: The shaded area represents those properties which fall within the outline of a Tree Preservation Order. To precisely identify trees protected by the Order, you can request a copy of the tree preservation order at the following link.
organisation
entry-date: 2025-11-30
start-date
end-date

Your dataset is missing the tree-preservation-order column.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.