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: TPO492
name: 4/1983
tree-preservation-order: undefined
4/1983
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.626609 51.269009,0.626420 51.269008,0.624136 51.269151,0.624018 51.269183,0.623681 51.269252,0.623663 51.268998,0.625071 51.268511,0.624587 51.267968,0.624574 51.267951,0.624587 51.267918,0.624616 51.267897,0.625565 51.267532,0.625721 51.267464,0.625747 51.267490,0.625761 51.267517,0.625874 51.267633,0.626175 51.267877,0.626281 51.267986,0.626347 51.268004,0.626409 51.268007,0.626436 51.268058,0.626456 51.268077,0.626517 51.268122,0.626554 51.268129,0.626541 51.268141,0.626529 51.268195,0.626532 51.268208,0.626610 51.268306,0.626628 51.268363,0.626613 51.268478,0.626633 51.268571,0.626725 51.268667,0.626760 51.268721,0.626768 51.268778,0.626756 51.268846,0.626717 51.268908,0.626609 51.269009)))
point: POINT (0.625466 51.268472)
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.