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: ZZZZDVESXE571
name: Amersham Rural District Council (Hill Farm, Chalfont St Peter) Tree Preservation Order, 1966 Confirm
tree-preservation-order: undefined
TPO/1966/034
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.550149 51.610219,-0.550177 51.610232,-0.550191 51.610256,-0.550196 51.610274,-0.550201 51.610282,-0.550210 51.610286,-0.550222 51.610289,-0.550302 51.610293,-0.550350 51.610306,-0.550385 51.610322,-0.550413 51.610329,-0.550430 51.610329,-0.550467 51.610321,-0.550477 51.610311,-0.550478 51.610281,-0.550445 51.610269,-0.550369 51.610268,-0.550340 51.610262,-0.550314 51.610261,-0.550298 51.610254,-0.550261 51.610242,-0.550254 51.610234,-0.550241 51.610235,-0.550220 51.610224,-0.550217 51.610218,-0.550211 51.610212,-0.550204 51.610209,-0.550194 51.610209,-0.550186 51.610193,-0.550176 51.610190,-0.550162 51.610191,-0.550153 51.610185,-0.550156 51.610176,-0.550148 51.610171,-0.550125 51.610166,-0.550109 51.610168,-0.550098 51.610175,-0.550097 51.610185,-0.550149 51.610219)))
point: POINT (-0.550295 51.610263)
notes
entry-date: 2010-02-18
start-date: 2010-02-18
end-date

Your data is missing a tree-preservation-order.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.