Tree preservation zone

There is a problem

reference: TPO 0011 (1969)/A2
name: STEEPLE MORDEN Brook End
tree-preservation-order: TPO 0011 (1969)
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.114816 52.082434,-0.114823 52.082410,-0.114923 52.082348,-0.114920 52.082256,-0.114896 52.082139,-0.114900 52.082035,-0.114918 52.081924,-0.114890 52.081816,-0.114860 52.081774,-0.114782 52.081709,-0.114785 52.081633,-0.114808 52.081552,-0.115432 52.081454,-0.116293 52.081265,-0.116865 52.081123,-0.117183 52.081078,-0.117506 52.081014,-0.118038 52.080953,-0.118619 52.080940,-0.118614 52.081030,-0.117805 52.081053,-0.117272 52.081120,-0.117522 52.081613,-0.117668 52.081593,-0.117499 52.081175,-0.117836 52.081142,-0.118756 52.081131,-0.118779 52.080896,-0.117980 52.080894,-0.117516 52.080933,-0.116795 52.081040,-0.116533 52.081111,-0.115643 52.081310,-0.115349 52.081352,-0.115019 52.081431,-0.114750 52.081468,-0.114699 52.081564,-0.114644 52.081626,-0.114636 52.081658,-0.114642 52.081683,-0.114665 52.081717,-0.114780 52.081807,-0.114820 52.081875,-0.114768 52.082081,-0.114775 52.082181,-0.114771 52.082252,-0.114788 52.082301,-0.114672 52.082359,-0.114655 52.082375,-0.114653 52.082391,-0.114755 52.082572,-0.114766 52.082650,-0.114994 52.082791,-0.115109 52.082744,-0.114935 52.082601,-0.114816 52.082434)))
point: POINT (-0.116541 52.081431)
notes
entry-date: 2025-06-27
start-date: start-date must be a real date
1970-08-11
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