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: 827
name: THE BIRMINGHAM (ACORNS CHILDRENS HOSPICE, 103 OAK TREE LANE, SELLY OAK) TPO 1999
tree-preservation-order: undefined
TPO 827
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.939707 52.434736,-1.939102 52.434738,-1.939109 52.434760,-1.939076 52.435099,-1.939171 52.435140,-1.939211 52.435149,-1.939383 52.435176,-1.939632 52.435197,-1.939615 52.435168,-1.939619 52.435143,-1.939647 52.435133,-1.939669 52.435137,-1.939722 52.435103,-1.939730 52.434935,-1.939707 52.434736)))
point: POINT (-1.939411 52.434951)
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.