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: TPO701
name: 18/1986
tree-preservation-order: undefined
18/1986
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.637927 51.292800,0.637887 51.292734,0.637799 51.292480,0.637747 51.292259,0.637684 51.292122,0.637653 51.292077,0.638300 51.292017,0.638988 51.291896,0.639121 51.291859,0.639083 51.292079,0.639061 51.292282,0.639022 51.292354,0.639006 51.292447,0.638963 51.292539,0.638939 51.292613,0.638831 51.293098,0.638111 51.293133,0.637969 51.293109,0.637939 51.292898,0.637937 51.292829,0.637927 51.292800)))
point: POINT (0.638422 51.292498)
notes: The Maidstone Borough Council Tree Preservation Order No 18 of 1986 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W5 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.