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: ZZZZDVESXE534
name: The Rural District Council of Amersham (Philipshill Wood, Chalfont St Peter) Tree Preservation (Amen
tree-preservation-order: undefined
TPO/1967/041
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.540387 51.646157,-0.540487 51.646343,-0.540770 51.646229,-0.541058 51.646127,-0.541376 51.645937,-0.541534 51.645796,-0.541662 51.645619,-0.541780 51.645370,-0.542152 51.644904,-0.542424 51.644493,-0.543253 51.642981,-0.547549 51.643149,-0.547930 51.642472,-0.547821 51.642313,-0.546606 51.641993,-0.546283 51.641886,-0.544789 51.641552,-0.542962 51.641200,-0.542581 51.639856,-0.542362 51.639304,-0.542184 51.639008,-0.541481 51.638579,-0.541058 51.638386,-0.540299 51.638165,-0.539800 51.638101,-0.539260 51.638066,-0.539156 51.638659,-0.539076 51.639614,-0.538977 51.640112,-0.538732 51.640671,-0.538269 51.641531,-0.538086 51.642107,-0.536590 51.643812,-0.536308 51.644108,-0.536175 51.644298,-0.535890 51.644604,-0.535735 51.644744,-0.537547 51.645614,-0.538619 51.646147,-0.538678 51.646150,-0.539294 51.646415,-0.539622 51.646275,-0.539718 51.646243,-0.540387 51.646157)))
point: POINT (-0.540843 51.642577)
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.