Tree preservation zone

There is a problem

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

reference: TPO33
name: Near to Prospect Farm
tree-preservation-order: undefined
Alkborough 1969
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-0.665854 53.686680,-0.665796 53.686723,-0.665728 53.686778,-0.665932 53.686853,-0.666255 53.686985,-0.666761 53.687166,-0.666982 53.687282,-0.667359 53.687334,-0.667531 53.687413,-0.667593 53.687482,-0.667850 53.687559,-0.668041 53.687603,-0.668233 53.687651,-0.668425 53.687692,-0.668578 53.687739,-0.668814 53.687845,-0.669062 53.687932,-0.669248 53.687976,-0.669580 53.688072,-0.669779 53.688105,-0.669887 53.688144,-0.670078 53.688219,-0.670138 53.688154,-0.669627 53.688003,-0.669361 53.687928,-0.669261 53.687903,-0.669113 53.687862,-0.668976 53.687813,-0.668537 53.687639,-0.668013 53.687492,-0.667535 53.687311,-0.666960 53.687086,-0.666733 53.687014,-0.666635 53.686959,-0.666331 53.686856,-0.666277 53.686836,-0.666208 53.686807,-0.666117 53.686806,-0.666076 53.686789,-0.665945 53.686722,-0.665854 53.686680)))
point: POINT (-0.667629 53.687387)
notes
entry-date: 1970-05-07
start-date: 1969-10-12
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.