Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: TPO77
name: Mount Pleasant Farm
tree-preservation-order: undefined
Mount Pleasant, Kirton in Lindsey 1977
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.588160 53.491247,-0.588296 53.491245,-0.588323 53.491224,-0.588297 53.491141,-0.588244 53.491038,-0.588053 53.490732,-0.587865 53.490397,-0.587862 53.490377,-0.587891 53.490350,-0.588096 53.490301,-0.588210 53.490242,-0.588239 53.490213,-0.588251 53.490178,-0.588239 53.490124,-0.588215 53.490090,-0.587057 53.490174,-0.587015 53.490185,-0.586986 53.490205,-0.586968 53.490327,-0.587076 53.491259,-0.587100 53.491257,-0.587151 53.491232,-0.587178 53.491189,-0.587183 53.491134,-0.587176 53.490707,-0.587196 53.490649,-0.587284 53.490551,-0.587438 53.490450,-0.587498 53.490422,-0.587597 53.490404,-0.587648 53.490409,-0.587688 53.490436,-0.587739 53.490515,-0.587761 53.490575,-0.587826 53.490667,-0.587940 53.490880,-0.588081 53.491096,-0.588160 53.491247)))
point: POINT (-0.587581 53.490523)
notes
organisation
entry-date: 1977-07-06
start-date: 1977-05-17
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.