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: TPO671
name: 19/1984
tree-preservation-order: undefined
19/1984
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.607766 51.283435,0.607444 51.283544,0.607373 51.283457,0.607230 51.283309,0.607175 51.283276,0.607072 51.283234,0.607018 51.283185,0.606812 51.283030,0.606659 51.282896,0.606398 51.282710,0.606051 51.282410,0.605916 51.282310,0.605761 51.282170,0.605633 51.282035,0.605433 51.281790,0.605376 51.281741,0.605703 51.281661,0.605828 51.281825,0.605967 51.281954,0.606475 51.282354,0.606677 51.282555,0.606837 51.282693,0.607269 51.282975,0.607458 51.283120,0.607607 51.283245,0.607673 51.283311,0.607766 51.283435)))
point: POINT (0.606566 51.28262)
notes: Maidstone Borough Council Tree Preservation Order No 19 of 1984 made under Section 60 of the Town and Country Planning Act 1971 Woodlands - W2 comprising species Cherry, Common
organisation
entry-date: 1984-09-06
start-date: 1984-08-28
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.