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: ZZZZDTESXE840
name: The Chiltern District Council (Land adjacent to Cokes Cottage and Little Orchards, Cokes Farm Lane,
tree-preservation-order: undefined
TPO/2007/001
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.576523 51.662047,-0.576536 51.662046,-0.576560 51.662041,-0.576595 51.662021,-0.576652 51.661985,-0.576654 51.661935,-0.576646 51.661886,-0.576631 51.661759,-0.576602 51.661640,-0.576586 51.661526,-0.576546 51.661278,-0.576216 51.661318,-0.576182 51.661323,-0.576144 51.661331,-0.576119 51.661340,-0.576104 51.661350,-0.576078 51.661375,-0.576043 51.661404,-0.576010 51.661426,-0.575999 51.661437,-0.575989 51.661452,-0.575982 51.661488,-0.575982 51.661509,-0.575984 51.661523,-0.575988 51.661534,-0.576005 51.661604,-0.576031 51.661680,-0.576064 51.661748,-0.576125 51.661842,-0.576124 51.661856,-0.576085 51.661877,-0.576076 51.661889,-0.576072 51.661898,-0.576066 51.661924,-0.576063 51.661991,-0.576065 51.662011,-0.576073 51.662042,-0.576078 51.662048,-0.576086 51.662053,-0.576103 51.662058,-0.576144 51.662059,-0.576404 51.662052,-0.576523 51.662047)))
point: POINT (-0.576329 51.661683)
notes
entry-date: 2010-02-18
start-date: 2010-02-18
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.