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: TPO766
name: 1/1992
tree-preservation-order: undefined
1/1992
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.606864 51.311150,0.606923 51.311185,0.606919 51.311319,0.606936 51.311439,0.606974 51.311587,0.607030 51.311729,0.607032 51.311812,0.607069 51.311945,0.607117 51.312077,0.607224 51.312192,0.607268 51.312264,0.607265 51.312291,0.607230 51.312319,0.607183 51.312350,0.607133 51.312367,0.607094 51.312371,0.607012 51.312344,0.606966 51.312269,0.606930 51.312172,0.606910 51.312169,0.606759 51.312202,0.606734 51.312195,0.606712 51.312148,0.606710 51.312112,0.606725 51.312061,0.606765 51.312048,0.606874 51.312036,0.606922 51.312007,0.606926 51.311986,0.606915 51.311936,0.606858 51.311826,0.606742 51.311652,0.606720 51.311600,0.606696 51.311538,0.606639 51.311326,0.606643 51.311270,0.606660 51.311237,0.606697 51.311206,0.606810 51.311159,0.606864 51.311150)))
point: POINT (0.606913 51.311783)
notes: The Maidstone Borough Council Tree Preservation Order No 1 of 1992 under Section 198 of the Town and Country Planning Act 1990 Woodlands - W3 consisting mainly Hawthorn,
organisation
entry-date: 1992-02-10
start-date: 1992-02-07
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.