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: 1420
name: THE BIRMINGHAM (LAND ADJACENT TO THE INTERNATIONAL CONVENTION CENTRE, BROAD STREET, LADYWOOD) TPO 2012
tree-preservation-order: undefined
TPO 1420
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.910451 52.478204,-1.910198 52.478305,-1.910223 52.478338,-1.910296 52.478331,-1.910369 52.478337,-1.910435 52.478355,-1.910499 52.478388,-1.910550 52.478375,-1.910437 52.478223,-1.910451 52.478204)))
point: POINT (-1.910389 52.478303)
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.