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: TPO695
name: 18/1986
tree-preservation-order: undefined
18/1986
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.640293 51.290089,0.640365 51.290220,0.640471 51.290348,0.640546 51.290479,0.640637 51.290687,0.640670 51.290784,0.640721 51.290832,0.641058 51.290994,0.641136 51.291075,0.641165 51.291135,0.641173 51.291224,0.641130 51.291413,0.641110 51.291552,0.641086 51.291633,0.641027 51.291800,0.640961 51.291953,0.640920 51.292033,0.640858 51.292125,0.640719 51.292127,0.640463 51.292082,0.640280 51.292103,0.639851 51.292043,0.639310 51.291910,0.639142 51.291846,0.639124 51.291843,0.639121 51.291858,0.639054 51.291850,0.638886 51.291811,0.638893 51.291803,0.638853 51.291720,0.638852 51.291697,0.638909 51.291472,0.638913 51.291405,0.638864 51.291226,0.638778 51.291106,0.638749 51.290907,0.638800 51.290618,0.638823 51.290589,0.638831 51.290556,0.638818 51.290428,0.638832 51.290362,0.638788 51.290269,0.638809 51.290078,0.638829 51.290049,0.638853 51.290023,0.638898 51.290001,0.638912 51.289963,0.639905 51.290016,0.640439 51.289986,0.640362 51.290015,0.640303 51.290068,0.640293 51.290089)))
point: POINT (0.639877 51.291072)
notes: The Maidstone Borough Council Tree Preservation Order No 18 of 1986 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W1 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.