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: TPO667
name: 4/1969
tree-preservation-order: undefined
4/1969
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.588743 51.281118,0.589934 51.280806,0.590394 51.280703,0.590565 51.280676,0.590614 51.280707,0.590936 51.281177,0.591377 51.281781,0.591123 51.281899,0.590113 51.282242,0.589762 51.282316,0.588980 51.282513,0.588696 51.282658,0.588322 51.282761,0.588277 51.282562,0.588291 51.282381,0.588285 51.282157,0.588312 51.281996,0.588323 51.281795,0.588681 51.281829,0.588712 51.281796,0.588700 51.281750,0.588584 51.281639,0.588355 51.281484,0.588198 51.281390,0.588512 51.281247,0.588610 51.281183,0.588743 51.281118)))
point: POINT (0.589667 51.28166)
notes: County of Kent (Hollingbourne Rural District) Tree Preservation Order No 4, 1969 relating to woodland at Gore Wood, Thurnham made on 19th June 1969 and by virtue of Section 16 of the Civic Amenities Act 1967 came into effect
organisation
entry-date: 1969-06-26
start-date: 1969-06-19
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.