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: 340
name: THE BIRMINGHAM (38 HARTOPP ROAD, FOUR OAKS) TPO 1981
tree-preservation-order: undefined
TPO 340
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.839351 52.575740,-1.840078 52.575311,-1.841345 52.574578,-1.840954 52.574302,-1.840275 52.573930,-1.839590 52.573795,-1.838514 52.574441,-1.837975 52.574849,-1.839351 52.575740)))
point: POINT (-1.839625 52.574708)
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.