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: 157
name: THE BIRMINGHAM (117 SUTTON ROAD, ERDINGTON) TPO 1975
tree-preservation-order: undefined
TPO 157
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.828867 52.532800,-1.828960 52.532711,-1.828479 52.532508,-1.828633 52.532383,-1.828210 52.532210,-1.828135 52.532247,-1.828322 52.532441,-1.828331 52.532439,-1.828426 52.532534,-1.828867 52.532800)))
point: POINT (-1.828513 52.53248)
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.
entry-date: 2026-02-12
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.