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: 44
name: THE BIRMINGHAM (39 ST PETERS ROAD, HARBORNE) TPO 1968
tree-preservation-order: undefined
TPO 44
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.957834 52.455829,-1.957974 52.455755,-1.957512 52.455525,-1.957503 52.455649,-1.957484 52.455651,-1.957465 52.455969,-1.957691 52.455893,-1.957834 52.455829)))
point: POINT (-1.957651 52.455756)
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.