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: 867
name: THE BIRMINGHAM (LAND AT AND ADJOINING 108 - 120 GRACEMERE CRESCENT, HALL GREEN) TPO 1999
tree-preservation-order: undefined
TPO 867
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.848069 52.411510,-1.848151 52.411541,-1.848743 52.411331,-1.848283 52.410492,-1.848217 52.410532,-1.848041 52.410666,-1.847677 52.410869,-1.847617 52.410883,-1.847596 52.410908,-1.847597 52.410917,-1.847552 52.410948,-1.847521 52.410938,-1.847458 52.411012,-1.847404 52.411035,-1.847382 52.411061,-1.847359 52.411055,-1.847304 52.411121,-1.847359 52.411143,-1.847428 52.411099,-1.847600 52.411370,-1.847614 52.411379,-1.847720 52.411519,-1.847781 52.411505,-1.847876 52.411498,-1.848069 52.411510)))
point: POINT (-1.848075 52.4111)
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.