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: 1220
name: THE BIRMINGHAM (LAND AT HEADLEY CROFT, KINGS NORTON) TPO 2007
tree-preservation-order: undefined
TPO 1220
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.946594 52.400140,-1.946603 52.400126,-1.947252 52.399936,-1.947231 52.399909,-1.947488 52.399745,-1.947579 52.399834,-1.947771 52.399777,-1.947787 52.399796,-1.947862 52.399845,-1.947958 52.399971,-1.948220 52.399893,-1.948235 52.399867,-1.947966 52.399549,-1.947247 52.399016,-1.947189 52.399004,-1.947144 52.399007,-1.946044 52.399383,-1.945972 52.399429,-1.945937 52.399477,-1.945929 52.399513,-1.945952 52.399570,-1.946442 52.400323,-1.946495 52.400354,-1.946572 52.400369,-1.946644 52.400358,-1.946737 52.400330,-1.946594 52.400140)))
point: POINT (-1.946947 52.399618)
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.