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: TPO647
name: 20/1995
tree-preservation-order: undefined
20/1995
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.582224 51.268542,0.581848 51.268303,0.581673 51.268201,0.581587 51.268137,0.581408 51.267983,0.581025 51.267635,0.580624 51.267233,0.580555 51.267142,0.580520 51.267040,0.582199 51.267112,0.582219 51.267164,0.582636 51.267712,0.583061 51.268244,0.583186 51.268351,0.583283 51.268477,0.583296 51.268539,0.583365 51.268639,0.583384 51.268682,0.583391 51.268725,0.583387 51.268779,0.583360 51.268839,0.583315 51.268845,0.583301 51.268854,0.583012 51.269214,0.582765 51.269437,0.582743 51.269452,0.582640 51.269482,0.582627 51.269477,0.582688 51.269460,0.582677 51.269330,0.582688 51.269130,0.582614 51.268863,0.582550 51.268762,0.582491 51.268706,0.582224 51.268542)))
point: POINT (0.582125 51.267976)
notes: The Maidstone Borough Council Tree Preservation Order No.20 of 1995 under Section 198 of the Town and Country Planning Act 1990 Woodlands - W1 Comprising Alder, Ash, Birch, Elm, Hazel,
organisation
entry-date: 1995-10-06
start-date: 1995-10-06
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.