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: TPO610
name: 22/1987
tree-preservation-order: undefined
22/1987
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((0.639747 51.299307,0.639708 51.299222,0.639669 51.299173,0.639656 51.299136,0.639446 51.298749,0.639389 51.298662,0.639163 51.298388,0.639363 51.298337,0.639477 51.298449,0.639555 51.298545,0.639634 51.298654,0.639776 51.298821,0.639859 51.298998,0.639987 51.299192,0.640004 51.299282,0.640032 51.299370,0.640105 51.299557,0.640008 51.299546,0.639950 51.299525,0.639847 51.299461,0.639803 51.299415,0.639747 51.299307)))
point: POINT (0.639674 51.298942)
notes: The Maidstone Borough Council Tree Preservation Order No 22 of 1987 under Section 60 of the Town and Country Planning Act 1971 Group of Trees - G11 - 39 Oak, 2 Ash
organisation
entry-date: 1987-07-31
start-date: 1987-07-24
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.