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: 454
name: THE BIRMINGHAM (LAND ADJACENT TO BELL HOLLOWAY, NORTHFIELD) TPO 1985
tree-preservation-order: undefined
TPO 454
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.973420 52.419334,-1.973412 52.419168,-1.973395 52.419168,-1.973385 52.419050,-1.973418 52.418934,-1.973410 52.418823,-1.973486 52.418575,-1.973531 52.418330,-1.973042 52.418333,-1.972847 52.418075,-1.972792 52.417988,-1.972595 52.417770,-1.972503 52.417694,-1.972422 52.417641,-1.972436 52.417630,-1.972190 52.417506,-1.971990 52.417373,-1.971898 52.417302,-1.971832 52.417311,-1.971487 52.417482,-1.971143 52.417581,-1.970885 52.417698,-1.970725 52.417826,-1.970689 52.417871,-1.970790 52.417931,-1.971297 52.418180,-1.971571 52.418292,-1.971971 52.418479,-1.972450 52.418791,-1.972976 52.419107,-1.973400 52.419334,-1.973420 52.419334)))
point: POINT (-1.972256 52.418201)
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.