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: 584
name: THE BIRMINGHAM (LAND OFF MONKSPATH & REAR OF 63 FOX HOLLIES ROAD, WALMLEY, SUTTON COLDFIELD) TPO 1992
tree-preservation-order: undefined
TPO 584
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.796489 52.544442,-1.796528 52.544224,-1.796639 52.544223,-1.796647 52.544145,-1.796532 52.544145,-1.796563 52.543895,-1.795796 52.543859,-1.795800 52.543966,-1.795676 52.544050,-1.795676 52.544059,-1.795422 52.544048,-1.795412 52.544284,-1.795425 52.544282,-1.795420 52.544368,-1.795588 52.544368,-1.796484 52.544478,-1.796489 52.544442)))
point: POINT (-1.796046 52.544166)
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.