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: 768
name: THE BIRMINGHAM (1A GOSS CROFT, SELLY OAK) TPO 1997
tree-preservation-order: undefined
TPO 768
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.947134 52.439456,-1.947127 52.439411,-1.946993 52.439480,-1.946607 52.439439,-1.946597 52.439460,-1.946406 52.439487,-1.946179 52.439473,-1.946252 52.439525,-1.946287 52.439504,-1.946365 52.439560,-1.946425 52.439528,-1.946523 52.439597,-1.946486 52.439619,-1.946776 52.439622,-1.946795 52.439636,-1.947029 52.439500,-1.947134 52.439456)))
point: POINT (-1.946682 52.439526)
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.