Tree preservation zone

There is a problem

reference: tpo4398
name: Saltmarsh No. 2 - 1971
tree-preservation-order: 31
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.825792 53.703125,-0.825579 53.702994,-0.825433 53.703057,-0.825393 53.703206,-0.825189 53.703408,-0.824987 53.703524,-0.824294 53.703795,-0.823236 53.704223,-0.822817 53.704358,-0.821763 53.704658,-0.821035 53.704887,-0.819256 53.705308,-0.818222 53.705523,-0.817189 53.705673,-0.816828 53.705691,-0.816467 53.705687,-0.816198 53.705652,-0.815977 53.705811,-0.816478 53.705965,-0.817055 53.705961,-0.818969 53.705669,-0.819447 53.705545,-0.819479 53.705588,-0.819537 53.705578,-0.820372 53.705362,-0.821520 53.704966,-0.822429 53.704697,-0.823247 53.704491,-0.823792 53.704336,-0.824998 53.703791,-0.825782 53.703478,-0.825806 53.703264,-0.825792 53.703125)))
point: POINT (-0.821158 53.704825)
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