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: ZZZZZWESRW935
name: The Eton E.D.C. Tree Preservation Order No.1; 1962; dated 23/2/63; made under S.28 of the Town and C
tree-preservation-order: undefined
TPO/BD/1962/01
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.558797 51.583349,-0.559194 51.583649,-0.559318 51.583724,-0.559633 51.583979,-0.559687 51.584037,-0.559945 51.583920,-0.560184 51.583928,-0.560498 51.583942,-0.560474 51.583844,-0.560493 51.583796,-0.560617 51.583503,-0.560667 51.583389,-0.560695 51.583319,-0.560755 51.583178,-0.560771 51.583136,-0.560811 51.583048,-0.560894 51.582854,-0.560563 51.582751,-0.560308 51.582885,-0.560059 51.583012,-0.559988 51.583050,-0.559924 51.582986,-0.559766 51.582845,-0.559703 51.582815,-0.559560 51.582752,-0.559397 51.582677,-0.559098 51.582543,-0.558876 51.582762,-0.558648 51.582995,-0.558632 51.583009,-0.558591 51.583053,-0.558559 51.583095,-0.558551 51.583111,-0.558549 51.583129,-0.558551 51.583148,-0.558558 51.583168,-0.558564 51.583180,-0.558596 51.583207,-0.558703 51.583286,-0.558797 51.583349)))
point: POINT (-0.559739 51.583282)
notes
entry-date: 2017-07-04
start-date: 2017-07-04
end-date

Your data is missing a tree-preservation-order.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.