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: 463
name: THE BIRMINGHAM (SITE-CORNER OF ETHEL ROAD/ST MARY'S ROAD, HARBORNE) TPO 1985
tree-preservation-order: undefined
TPO 463
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.949756 52.456647,-1.949900 52.456011,-1.949887 52.455988,-1.949854 52.455989,-1.949561 52.456072,-1.949450 52.456638,-1.949756 52.456647)))
point: POINT (-1.949673 52.45633)
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.