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: TPO958
name: 3/1972
tree-preservation-order: undefined
3/1972
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.743710 51.251538,0.744342 51.251878,0.744419 51.251933,0.744430 51.252022,0.744375 51.252154,0.744286 51.252302,0.744158 51.252485,0.743767 51.252820,0.743653 51.252896,0.743554 51.252890,0.743372 51.252821,0.743012 51.252661,0.742562 51.252474,0.742807 51.252287,0.743039 51.252082,0.743337 51.251788,0.743633 51.251559,0.743710 51.251538)))
point: POINT (0.743595 51.252242)
notes: County of Kent (Hollingbourne Rural Area) Tree Preservation Order No 3 of 1972 under the provision of Section 29 of the Town and Country Planning Act 1962. Woodlands - W2 Mixed hardwoods consisting of
organisation
entry-date: 1974-03-17
start-date: 1972-03-23
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.