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: 473
name: THE BIRMINGHAM (FORMER MIRFIELD SCHOOL MIRFIELD ROAD, LEA VILLAGE) TPO 1986
tree-preservation-order: undefined
TPO 473
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-1.781431 52.481219,-1.781677 52.481131,-1.782180 52.480916,-1.782982 52.480512,-1.782996 52.480491,-1.782996 52.480450,-1.782970 52.480409,-1.782807 52.480338,-1.781697 52.479943,-1.780952 52.479651,-1.780701 52.479858,-1.780395 52.479965,-1.779899 52.480109,-1.780690 52.480719,-1.781007 52.480997,-1.781149 52.480943,-1.781230 52.481031,-1.781431 52.481219)))
point: POINT (-1.781435 52.48042)
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.