Tree preservation zone

There is a problem

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

reference: TPO051.A1
name: On either side of Sandforth Road.
tree-preservation-order: undefined
TPO051
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.911717 53.427306,-2.912788 53.426774,-2.913051 53.426681,-2.912753 53.426422,-2.913154 53.426257,-2.914755 53.425698,-2.914622 53.425595,-2.915237 53.425353,-2.915119 53.425247,-2.915479 53.425120,-2.915381 53.424972,-2.915361 53.424927,-2.915310 53.424935,-2.913018 53.425854,-2.912600 53.426057,-2.912200 53.426303,-2.911902 53.426452,-2.910270 53.427172,-2.910123 53.427240,-2.910087 53.427268,-2.909890 53.427131,-2.909786 53.427191,-2.909755 53.427603,-2.909138 53.427568,-2.907072 53.428512,-2.907070 53.428636,-2.907027 53.428940,-2.907118 53.428997,-2.907157 53.428966,-2.907381 53.428838,-2.907786 53.428634,-2.909060 53.428071,-2.910231 53.427486,-2.910077 53.427357,-2.910084 53.427326,-2.910113 53.427279,-2.910185 53.427233,-2.910249 53.427205,-2.910876 53.427720,-2.910962 53.427679,-2.910956 53.427672,-2.911717 53.427306)))
point: POINT (-2.911359 53.426934)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1970-08-19
start-date: 1971-01-20
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.