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: 331
name: THE BIRMINGHAM (LAND REAR OF 18-44 SYCAMORE ROAD, ERDINGTON) TPO 1981
tree-preservation-order: undefined
TPO 331
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.845979 52.540795,-1.846758 52.540195,-1.846857 52.540242,-1.847272 52.540085,-1.847281 52.540026,-1.846661 52.539742,-1.846602 52.539802,-1.846206 52.540129,-1.845598 52.540612,-1.845979 52.540795)))
point: POINT (-1.846423 52.540248)
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.