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: TPO769
name: 1/1992
tree-preservation-order: undefined
1/1992
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.601474 51.312281,0.601531 51.312282,0.601596 51.312304,0.601642 51.312346,0.601700 51.312436,0.601813 51.312667,0.601823 51.312762,0.601823 51.312869,0.601800 51.313004,0.601754 51.313186,0.601749 51.313246,0.601773 51.313444,0.601745 51.313481,0.601713 51.313502,0.601591 51.313496,0.601544 51.313478,0.601505 51.313395,0.601500 51.313353,0.601511 51.313290,0.601530 51.313221,0.601564 51.313166,0.601622 51.312997,0.601634 51.312871,0.601586 51.312713,0.601500 51.312568,0.601480 51.312517,0.601448 51.312471,0.601402 51.312376,0.601393 51.312341,0.601404 51.312314,0.601430 51.312290,0.601474 51.312281)))
point: POINT (0.601646 51.312878)
notes: The Maidstone Borough Council Tree Preservation Order No 1 of 1992 under Section 198 of the Town and Country Planning Act 1990 Woodlands - W1 consisting mainly Oak, Ash,
organisation
entry-date: 1992-02-10
start-date: 1992-02-07
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.