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: ZZZZDVESXE533
name: The Rural District Council of Amersham (Philipshill Wood, Chalfont St Peter) Tree Preservation (Amen
tree-preservation-order: undefined
TPO/1967/041
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.535234 51.648832,-0.535141 51.648914,-0.535129 51.648970,-0.535260 51.649028,-0.535570 51.649114,-0.536029 51.649261,-0.536288 51.649315,-0.536461 51.649274,-0.536639 51.649253,-0.537807 51.648880,-0.538359 51.648636,-0.538740 51.648537,-0.539762 51.648218,-0.540434 51.647910,-0.540517 51.647891,-0.540688 51.647880,-0.540821 51.647856,-0.541110 51.647729,-0.541214 51.647639,-0.541205 51.647530,-0.541300 51.647442,-0.541393 51.647384,-0.541459 51.647262,-0.541317 51.647170,-0.540946 51.646954,-0.540755 51.646781,-0.540508 51.646488,-0.540453 51.646368,-0.540487 51.646343,-0.540354 51.646161,-0.539657 51.646262,-0.539360 51.646387,-0.539496 51.646642,-0.539098 51.647023,-0.538839 51.647484,-0.538764 51.647565,-0.538582 51.647645,-0.538297 51.647708,-0.537867 51.647674,-0.537584 51.647611,-0.536882 51.647510,-0.536852 51.647451,-0.536238 51.647367,-0.536093 51.647471,-0.536037 51.647626,-0.535956 51.648093,-0.535897 51.648221,-0.535769 51.648354,-0.535604 51.648508,-0.535234 51.648832)))
point: POINT (-0.538332 51.647895)
notes
organisation
entry-date: 2010-02-18
start-date: 2010-02-18
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.