Tree preservation zone

There is a problem

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

reference: 6/2003/TAN A1
name: Land at the former Oxted Hospital Oxted Surrey
tree-preservation-order: undefined
6/2003/TAN
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.009058 51.264094,-0.009038 51.264132,-0.010201 51.263949,-0.011025 51.263860,-0.010902 51.263429,-0.010859 51.263319,-0.010942 51.263310,-0.010890 51.263204,-0.010805 51.263218,-0.010692 51.262867,-0.010228 51.262553,-0.010163 51.262532,-0.010245 51.262089,-0.010171 51.262096,-0.010062 51.262074,-0.010029 51.262149,-0.009993 51.262262,-0.009986 51.262311,-0.009995 51.262451,-0.010020 51.262531,-0.010031 51.262530,-0.010042 51.262585,-0.010033 51.262589,-0.010045 51.262836,-0.010081 51.262955,-0.009889 51.262980,-0.009836 51.262996,-0.009241 51.263069,-0.008686 51.263160,-0.008680 51.263301,-0.008674 51.263303,-0.008778 51.263562,-0.008828 51.263719,-0.009003 51.264046,-0.009012 51.264046,-0.009058 51.264094),(-0.010004 51.263205,-0.010213 51.263862,-0.009530 51.263970,-0.009259 51.263875,-0.009048 51.263336,-0.010004 51.263205)))
point: POINT (-0.009975 51.26333)
notes
organisation
entry-date: 2003-04-09
start-date: 2003-04-09
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.