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: 1440
name: THE BIRMINGHAM (100 SMIRRELLS ROAD, HALL GREEN) TPO 2012
tree-preservation-order: undefined
TPO 1440
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.846627 52.422653,-1.846442 52.422496,-1.846021 52.422686,-1.845946 52.422732,-1.845893 52.422799,-1.845834 52.422976,-1.845844 52.423027,-1.845882 52.423077,-1.846627 52.422653)))
point: POINT (-1.84619 52.422765)
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.