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: 404
name: THE BIRMINGHAM (LAND OFF WESTFIELD ROAD, KING'S HEATH) TPO 1983
tree-preservation-order: undefined
TPO 404
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.896561 52.437204,-1.897074 52.436792,-1.897181 52.436780,-1.896821 52.436613,-1.896701 52.436710,-1.896618 52.436674,-1.896374 52.436885,-1.896116 52.436952,-1.895967 52.437001,-1.895364 52.437233,-1.894926 52.437423,-1.895458 52.437307,-1.895745 52.437258,-1.896170 52.437219,-1.896561 52.437204)))
point: POINT (-1.8963 52.437019)
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.