Tree preservation zone

There is a problem

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

reference: TPO239.A1
name: Aigburth Vale Girls School Site
tree-preservation-order: undefined
TPO239
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.934224 53.374602,-2.933676 53.375232,-2.933148 53.375858,-2.933149 53.375868,-2.933890 53.376020,-2.933999 53.376034,-2.934378 53.375829,-2.934625 53.375715,-2.934852 53.375624,-2.935091 53.375542,-2.935423 53.375453,-2.935801 53.375378,-2.936137 53.375342,-2.936434 53.375328,-2.936721 53.375332,-2.936961 53.375346,-2.937021 53.375331,-2.937063 53.375286,-2.937058 53.375256,-2.937032 53.375231,-2.936417 53.374886,-2.935871 53.374562,-2.935658 53.374431,-2.935070 53.374033,-2.935001 53.373990,-2.934943 53.373968,-2.934874 53.373963,-2.934822 53.373970,-2.934773 53.373987,-2.934719 53.374022,-2.934500 53.374282,-2.934509 53.374316,-2.934398 53.374396,-2.934224 53.374602)))
point: POINT (-2.934919 53.375066)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1991-04-26
start-date: 1991-06-25
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.