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: ZZZZDVESXE119
name: The Chiltern District Council (Woodland at Netherground Spring, Little Chalfont) Tree Preservation O
tree-preservation-order: undefined
TPO/1984/005
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.549372 51.665832,-0.549779 51.665683,-0.550433 51.665399,-0.551410 51.664777,-0.551622 51.664650,-0.551818 51.664505,-0.551831 51.664474,-0.551826 51.664462,-0.551784 51.664423,-0.551663 51.664348,-0.551351 51.664538,-0.551027 51.664683,-0.550887 51.664695,-0.550811 51.664719,-0.550731 51.664730,-0.550643 51.664760,-0.550362 51.664903,-0.550208 51.665010,-0.550109 51.665059,-0.549846 51.665169,-0.549681 51.665257,-0.549449 51.665305,-0.549245 51.665378,-0.549016 51.665497,-0.548868 51.665588,-0.548673 51.665729,-0.548435 51.665855,-0.548421 51.665887,-0.548486 51.666014,-0.548541 51.666097,-0.548732 51.666063,-0.548769 51.666028,-0.548867 51.665984,-0.549372 51.665832)))
point: POINT (-0.550043 51.665288)
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.