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: TPO649
name: 5/1983
tree-preservation-order: undefined
5/1983
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.619578 51.271319,0.619674 51.271244,0.619877 51.271155,0.620110 51.271074,0.619947 51.271472,0.619971 51.271636,0.620084 51.271966,0.620190 51.272203,0.620263 51.272464,0.620358 51.272679,0.620526 51.272791,0.620646 51.273002,0.620826 51.273639,0.620763 51.273695,0.620561 51.273599,0.620582 51.273545,0.620660 51.273552,0.620439 51.273125,0.620351 51.272856,0.620265 51.272743,0.620169 51.272694,0.620120 51.272530,0.620056 51.272363,0.620021 51.272293,0.619865 51.271846,0.619784 51.271644,0.619720 51.271524,0.619544 51.271341,0.619578 51.271319)))
point: POINT (0.620187 51.272304)
notes: Maidstone Borough Council Tree Preservation Order No 5 of 1983 as varied by the Maidstone Borough Council Tree Preservation Order No.17 of 1988 made under Section 60 of the Town and Country Planning Act 1971
organisation
entry-date: 1988-11-05
start-date: 1988-11-06
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.