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: 994
name: THE BIRMINGHAM (LAND TO THE REAR OF 44-54 WOOD END LANE, ERDINGTON) TPO 2004
tree-preservation-order: undefined
TPO 994
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.843623 52.521148,-1.843987 52.520989,-1.843869 52.520792,-1.844331 52.520613,-1.844268 52.520497,-1.843829 52.520630,-1.843749 52.520526,-1.843826 52.520502,-1.843640 52.520303,-1.843370 52.520397,-1.842932 52.520600,-1.843623 52.521148)))
point: POINT (-1.843591 52.520706)
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.