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: TPO765
name: 1/1992
tree-preservation-order: undefined
1/1992
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.601186 51.312073,0.601243 51.312082,0.601294 51.312104,0.601325 51.312133,0.601331 51.312165,0.601320 51.312203,0.601260 51.312241,0.601100 51.312298,0.601021 51.312323,0.600905 51.312341,0.600697 51.312404,0.600585 51.312430,0.600521 51.312434,0.600496 51.312422,0.600430 51.312325,0.600405 51.312261,0.600424 51.312233,0.600531 51.312197,0.600624 51.312183,0.600937 51.312100,0.601110 51.312075,0.601186 51.312073)))
point: POINT (0.600857 51.312242)
notes: The Maidstone Borough Council Tree Preservation Order No 1 of 1992 under Section 198 of the Town and Country Planning Act 1990 Woodlands - W5 consisting mainly Ash, 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.