Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: TPO173
name: Within OS field No. 6223
tree-preservation-order: undefined
Beltoft 1973
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((-0.784974 53.547661,-0.785008 53.547565,-0.785082 53.547285,-0.785231 53.546742,-0.785242 53.546686,-0.785254 53.546635,-0.785298 53.546468,-0.785322 53.546367,-0.785336 53.546326,-0.785337 53.546312,-0.785331 53.546292,-0.785348 53.546254,-0.785398 53.546166,-0.785403 53.546134,-0.785439 53.545951,-0.785451 53.545881,-0.785466 53.545809,-0.785494 53.545712,-0.785536 53.545555,-0.785570 53.545441,-0.785592 53.545357,-0.785489 53.545359,-0.785352 53.545359,-0.785313 53.545362,-0.785163 53.545363,-0.784944 53.545368,-0.784798 53.545637,-0.784603 53.546009,-0.784407 53.546371,-0.784179 53.546803,-0.783822 53.547470,-0.783945 53.547489,-0.784267 53.547544,-0.784715 53.547616,-0.784974 53.547661)))
point: POINT (-0.784795 53.54658)
notes
entry-date: 1973-08-19
start-date: 1973-06-28
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.