Tree preservation zone

There is a problem

reference: tpo4419
name: Saltmarsh No. 2 - 1971
tree-preservation-order: 31
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((-0.819118 53.706741,-0.819620 53.707470,-0.819678 53.707600,-0.819710 53.707782,-0.819655 53.707913,-0.819467 53.708189,-0.819620 53.708308,-0.819880 53.708632,-0.820539 53.709406,-0.821141 53.710026,-0.821558 53.710490,-0.821227 53.710806,-0.821145 53.710867,-0.820940 53.710932,-0.819440 53.711358,-0.818813 53.711478,-0.818941 53.711636,-0.819134 53.712000,-0.819284 53.712223,-0.819477 53.712415,-0.819581 53.712573,-0.819602 53.712663,-0.819610 53.713053,-0.819559 53.713201,-0.819529 53.713256,-0.819586 53.713286,-0.819610 53.713276,-0.820640 53.713201,-0.821308 53.713186,-0.820913 53.713107,-0.820010 53.712499,-0.819529 53.712291,-0.819264 53.712095,-0.819006 53.711644,-0.819514 53.711531,-0.820877 53.711170,-0.821857 53.710987,-0.822292 53.710916,-0.822673 53.710834,-0.822713 53.710674,-0.822551 53.710683,-0.821867 53.709970,-0.821548 53.709774,-0.821213 53.709503,-0.820132 53.708144,-0.821152 53.707791,-0.820960 53.707553,-0.820831 53.707659,-0.820195 53.707856,-0.819380 53.706671,-0.819118 53.706741)))
point: POINT (-0.820601 53.710136)
notes
entry-date: 2026-03-17
start-date: start-date must be a real date
end-date

Your dataset is missing the start-date column.

The Tree preservation zone guidance explains how to fix the issue:

The date that the tree preservation order came into force, written in YYYY-MM-DD format.

Example: 1984-03-28