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: TPO676
name: 16/1986
tree-preservation-order: undefined
16/1986
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.662346 51.281842,0.662556 51.282152,0.662621 51.282217,0.662676 51.282289,0.663137 51.282943,0.663477 51.283356,0.663587 51.283582,0.662791 51.283832,0.662708 51.283723,0.662674 51.283656,0.662547 51.283484,0.662523 51.283437,0.662407 51.283126,0.662356 51.282955,0.662293 51.282895,0.662244 51.282797,0.662221 51.282773,0.662206 51.282713,0.662204 51.282649,0.662235 51.282560,0.662233 51.282508,0.662168 51.282433,0.662150 51.282305,0.662065 51.282181,0.661928 51.282049,0.661816 51.281927,0.661614 51.281774,0.661626 51.281722,0.662147 51.281615,0.662240 51.281706,0.662346 51.281842)))
point: POINT (0.662644 51.282807)
notes: Maidstone Borough Council Tree Preservation Order No 16 of 1986 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W3 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.