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: TPO679
name: 16/1986
tree-preservation-order: undefined
16/1986
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.663621 51.283657,0.663824 51.283603,0.663905 51.283592,0.663988 51.283588,0.664221 51.283596,0.664755 51.283622,0.666192 51.283774,0.666248 51.283792,0.666277 51.284028,0.666321 51.284181,0.665997 51.284332,0.665833 51.284426,0.665713 51.284472,0.665632 51.284487,0.665416 51.284489,0.665318 51.284477,0.664907 51.284393,0.664799 51.284392,0.664405 51.284416,0.663763 51.284323,0.663490 51.284317,0.663212 51.284335,0.663066 51.284211,0.662995 51.284109,0.662889 51.284007,0.662865 51.283962,0.662854 51.283909,0.662863 51.283895,0.662903 51.283878,0.663621 51.283657)))
point: POINT (0.664649 51.284027)
notes: Maidstone Borough Council Tree Preservation Order No 16 of 1986 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W2 Mixed Deciduous trees consisting
organisation
entry-date: 1986-08-13
start-date: 1986-07-19
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.