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: 394
name: THE BIRMINGHAM (95-97 HOLLY LANE AND LAND ADJOINING, ERDINGTON) TPO 1983
tree-preservation-order: undefined
TPO 394
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.830309 52.526187,-1.830248 52.526099,-1.829284 52.526371,-1.829182 52.526111,-1.828718 52.526312,-1.828963 52.526527,-1.829032 52.526578,-1.829227 52.526524,-1.830309 52.526187)))
point: POINT (-1.829363 52.526331)
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.