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: ZZZZDVESXE000
name: The Chiltern District Council (area of woodland at Pucks Paigles, Burtons Lane, Chalfont St Giles) T
tree-preservation-order: undefined
TPO/1986/010
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.558163 51.661568,-0.555949 51.662113,-0.556325 51.662676,-0.556868 51.662539,-0.556970 51.662491,-0.557012 51.662459,-0.557014 51.662389,-0.557167 51.662334,-0.557256 51.662317,-0.557443 51.662312,-0.557594 51.662320,-0.557671 51.662303,-0.557838 51.662295,-0.558360 51.662314,-0.558519 51.662385,-0.559055 51.662427,-0.559084 51.662441,-0.559204 51.662462,-0.559769 51.662491,-0.559943 51.662471,-0.560150 51.662400,-0.560335 51.662360,-0.560684 51.662317,-0.560679 51.662302,-0.560492 51.662157,-0.560132 51.661830,-0.560133 51.661835,-0.560123 51.661809,-0.559972 51.661660,-0.559778 51.661485,-0.559388 51.661184,-0.559342 51.661166,-0.559083 51.660957,-0.558106 51.661486,-0.558163 51.661568)))
point: POINT (-0.558485 51.661951)
notes
organisation
entry-date: 2010-02-18
start-date: 2010-02-18
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.