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: 848
name: THE BIRMINGHAM (LAND ADJOINING 134 GRAVELLY HILL NORTH, ERDINGTON) TPO 1999
tree-preservation-order: undefined
TPO 848
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.845478 52.520799,-1.845514 52.520761,-1.845150 52.520502,-1.844726 52.520671,-1.844742 52.520689,-1.844736 52.520697,-1.844683 52.520716,-1.844661 52.520692,-1.844598 52.520711,-1.844620 52.520726,-1.844632 52.520890,-1.845139 52.521121,-1.845299 52.520986,-1.845478 52.520799)))
point: POINT (-1.845056 52.520804)
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.