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: TPO453
name: 4/1983
tree-preservation-order: undefined
4/1983
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.625127 51.273713,0.625220 51.273726,0.625331 51.273795,0.625481 51.273932,0.625656 51.274024,0.625733 51.274087,0.625806 51.274209,0.626189 51.274540,0.626211 51.274596,0.626206 51.274620,0.626164 51.274658,0.626097 51.274666,0.625936 51.274597,0.625786 51.274457,0.625770 51.274418,0.625508 51.274144,0.625208 51.273958,0.625163 51.273899,0.625111 51.273856,0.625053 51.273789,0.625055 51.273744,0.625087 51.273724,0.625127 51.273713)))
point: POINT (0.625646 51.274186)
notes: Maidstone Borough Council Tree Preservation Order No 4 of 1983 as varied by the Maidstone Borough Council Tree Preservation Order No.16 of 1988 made under Section 60 of the Town and Country Planning Act 1971
organisation
entry-date: 1988-11-05
start-date: 1988-10-14
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.