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: TPO336
name: 1/1972
tree-preservation-order: undefined
1/1972
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.554895 51.333707,0.554553 51.333795,0.554447 51.333795,0.554365 51.333666,0.554336 51.333504,0.554331 51.333421,0.554337 51.333263,0.554327 51.333073,0.554297 51.332917,0.554324 51.332715,0.554340 51.332675,0.554408 51.332567,0.554544 51.332405,0.554672 51.332273,0.554965 51.332376,0.555031 51.332407,0.555128 51.332456,0.555302 51.332562,0.555323 51.332587,0.555391 51.332634,0.555605 51.332690,0.555633 51.332707,0.555801 51.332841,0.555893 51.332902,0.555989 51.332983,0.556159 51.333176,0.556161 51.333219,0.556128 51.333240,0.555854 51.333357,0.555253 51.333603,0.554895 51.333707)))
point: POINT (0.555039 51.33307)
notes: County of Kent (Hollingbourne Rural District and Chatham Borough) Tree preservation Order No 1, 1972 Woodlands - W4 Deciduous Woodland consisting mainly
organisation
entry-date: 1972-12-28
start-date: 1972-11-16
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.