Tree preservation zone

There is a problem

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

reference: 1/GOD W4
name: Woodland belt along the eastern boundaries of fields numbered 109 114 & 161 on Ordnance Sheet XXXV.15 (ed.1912)
tree-preservation-order: undefined
1/GOD
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((-0.071960 51.179972,-0.072045 51.179969,-0.072087 51.179939,-0.072011 51.179855,-0.070915 51.178762,-0.071135 51.178649,-0.071184 51.178484,-0.070752 51.177928,-0.070335 51.177326,-0.070917 51.177020,-0.071231 51.176727,-0.070807 51.176869,-0.070164 51.177037,-0.069404 51.176231,-0.068432 51.175530,-0.068337 51.175595,-0.068681 51.176003,-0.068899 51.176336,-0.069116 51.176461,-0.069108 51.176459,-0.069549 51.176689,-0.069796 51.176939,-0.070072 51.177060,-0.070586 51.178062,-0.070675 51.178192,-0.070751 51.178326,-0.070868 51.178466,-0.070987 51.178535,-0.070943 51.178621,-0.070857 51.178651,-0.070647 51.178631,-0.070684 51.178744,-0.070851 51.178935,-0.071284 51.179366,-0.071388 51.179486,-0.071715 51.179745,-0.071960 51.179972)))
point: POINT (-0.070226 51.177453)
notes
organisation
entry-date: 1951-04-20
start-date: 1951-04-20
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.