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: TPO999
name: 3/1990
tree-preservation-order: undefined
3/1990
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.670817 51.223654,0.671305 51.223605,0.671352 51.223452,0.671377 51.223301,0.671724 51.223352,0.671918 51.223405,0.672272 51.223406,0.672343 51.223359,0.672631 51.223329,0.672889 51.223309,0.673970 51.223252,0.673989 51.223264,0.674076 51.223264,0.674184 51.223586,0.674395 51.223959,0.674723 51.224934,0.674905 51.225384,0.674900 51.225523,0.674964 51.225666,0.674849 51.225716,0.674701 51.225754,0.674198 51.225834,0.673800 51.225873,0.673679 51.225893,0.673043 51.226012,0.672305 51.226174,0.672294 51.226186,0.672422 51.226413,0.672608 51.227009,0.672399 51.227036,0.671681 51.227180,0.671559 51.227217,0.671268 51.227346,0.671460 51.227525,0.670994 51.227242,0.670431 51.226822,0.670305 51.226711,0.670268 51.226659,0.670233 51.226582,0.670152 51.226341,0.670131 51.226257,0.669991 51.226074,0.669952 51.225975,0.669930 51.225883,0.669908 51.225683,0.669895 51.225205,0.669886 51.225093,0.669856 51.224894,0.669959 51.224700,0.670120 51.224463,0.670305 51.224092,0.670319 51.224029,0.670315 51.223642,0.670817 51.223654)))
point: POINT (0.672172 51.225075)
notes: The Maidstone Borough Council Tree Preservation Order No 3 of 1990 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W1 consisting mainly of Sweet Chestnut
organisation
entry-date: 1990-04-02
start-date: 1990-03-29
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.