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: 30
name: THE BIRMINGHAM (PETERSFIELD ROAD, HALL GREEN) TPO 1966
tree-preservation-order: undefined
TPO 30
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.850818 52.429810,-1.850739 52.429803,-1.850200 52.429465,-1.850917 52.428907,-1.850663 52.428692,-1.850457 52.428770,-1.850021 52.429029,-1.849924 52.428945,-1.849794 52.429010,-1.849528 52.429185,-1.849409 52.429228,-1.849158 52.429392,-1.849186 52.429405,-1.849625 52.429713,-1.849825 52.429603,-1.849815 52.429599,-1.849853 52.429575,-1.849924 52.429546,-1.850027 52.429485,-1.850673 52.429897,-1.850818 52.429810)))
point: POINT (-1.850078 52.429255)
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.