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: TPO953
name: 7/1990
tree-preservation-order: undefined
7/1990
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.666391 51.254322,0.666358 51.254290,0.666262 51.254163,0.666217 51.254041,0.666055 51.253117,0.666046 51.253033,0.666079 51.252975,0.666113 51.252946,0.666380 51.252883,0.666393 51.252908,0.666388 51.253116,0.666426 51.253334,0.666404 51.253576,0.666435 51.253724,0.666438 51.253890,0.666462 51.254102,0.666449 51.254174,0.666470 51.254210,0.666471 51.254270,0.666456 51.254291,0.666391 51.254322)))
point: POINT (0.66628 51.253534)
notes: The Maidstone Borough Council Tree Preservation Order No 7 of 1990 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W9 mixed Deciduous consisting mainly of
organisation
entry-date: 1990-10-05
start-date: 1990-10-02
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.