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: 266
name: THE BIRMINGHAM (PLOTS 7, 8, 9 AND 10 THE MOORLANDS, HARTOPP ROAD AND No.20 HARTOPP ROAD, SUTTON COLDFIELD) TPO 1978
tree-preservation-order: undefined
TPO 266
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.844294 52.579664,-1.844326 52.579382,-1.843373 52.579435,-1.843405 52.579922,-1.842587 52.579857,-1.842521 52.580127,-1.842453 52.580306,-1.844491 52.580570,-1.844782 52.580142,-1.844964 52.579737,-1.844295 52.579680,-1.844294 52.579664)))
point: POINT (-1.8438 52.580015)
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.