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: TPO626
name: 17/1976
tree-preservation-order: undefined
17/1976
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.582391 51.298449,0.582315 51.298369,0.582235 51.298315,0.582182 51.298259,0.582178 51.298236,0.582621 51.298062,0.582810 51.297962,0.583119 51.297771,0.583374 51.297550,0.583476 51.297445,0.583589 51.297353,0.583651 51.297285,0.583659 51.297242,0.583652 51.297228,0.583756 51.297240,0.583904 51.297278,0.584159 51.297432,0.584279 51.297630,0.584066 51.297762,0.583256 51.298142,0.582821 51.298360,0.582775 51.298386,0.582787 51.298395,0.582723 51.298438,0.582194 51.298770,0.581729 51.298709,0.581432 51.298657,0.581510 51.298633,0.581578 51.298602,0.581674 51.298589,0.581670 51.298578,0.581951 51.298536,0.582117 51.298483,0.582228 51.298578,0.582391 51.298449)))
point: POINT (0.583106 51.29799)
notes: Maidstone Borough Council Tree Preservation Order No. 17 of 1976 under Section 60 of the Town and Country Planning Act 1971. Woodlands - W2 Comprising Yew (Taxus baccata),
organisation
entry-date: 1976-07-12
start-date: 1976-07-02
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.