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: NHSYVRES07K00
name: TPO No 1 of 2015
tree-preservation-order: undefined
TPO/2015/001
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.612175 51.614279,-0.612139 51.614313,-0.612119 51.614339,-0.612108 51.614359,-0.612105 51.614385,-0.612122 51.614408,-0.612138 51.614426,-0.612180 51.614466,-0.612196 51.614474,-0.612199 51.614480,-0.612186 51.614487,-0.612058 51.614530,-0.611983 51.614548,-0.611903 51.614563,-0.611876 51.614565,-0.611863 51.614568,-0.611662 51.614675,-0.611541 51.614735,-0.611624 51.614763,-0.611705 51.614715,-0.611719 51.614705,-0.611742 51.614694,-0.611763 51.614681,-0.611829 51.614645,-0.611898 51.614621,-0.611953 51.614608,-0.612081 51.614591,-0.612174 51.614581,-0.612214 51.614570,-0.612259 51.614561,-0.612349 51.614539,-0.612484 51.614407,-0.612463 51.614396,-0.612441 51.614387,-0.612431 51.614380,-0.612353 51.614344,-0.612178 51.614275,-0.612175 51.614279)))
point: POINT (-0.612128 51.614496)
notes
entry-date: 2021-12-23
start-date: 2021-12-23
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.