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: 256
name: THE BIRMINGHAM (LAND REAR OF 33 SOMERVILLE ROAD, SUTTON COLDFIELD) TPO 1977
tree-preservation-order: undefined
TPO 256
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.832836 52.555587,-1.832789 52.555367,-1.831824 52.555444,-1.831797 52.555314,-1.831682 52.555323,-1.831606 52.554910,-1.830974 52.554960,-1.830902 52.555285,-1.830829 52.555565,-1.830713 52.555925,-1.830536 52.556384,-1.830650 52.556389,-1.830742 52.556381,-1.830694 52.556222,-1.831831 52.556126,-1.832713 52.556038,-1.832926 52.556025,-1.832836 52.555587)))
point: POINT (-1.831661 52.555677)
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.