Tree preservation zone

There is a problem

reference: 236
name
tree-preservation-order: The Chalet Green Lane Chessington KT9 2DT
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((-0.304387 51.352059,-0.304430 51.352034,-0.304367 51.352048,-0.304036 51.352095,-0.303991 51.352108,-0.303857 51.352142,-0.303692 51.352173,-0.302809 51.352311,-0.302786 51.352312,-0.302752 51.352318,-0.302731 51.352323,-0.302693 51.352335,-0.302651 51.352344,-0.302556 51.352351,-0.302347 51.352359,-0.302272 51.352368,-0.302190 51.352373,-0.302031 51.352388,-0.301972 51.352391,-0.301896 51.352398,-0.301857 51.352406,-0.301827 51.352418,-0.301462 51.352501,-0.301437 51.352501,-0.301025 51.352707,-0.300988 51.352730,-0.300790 51.353049,-0.300738 51.353142,-0.300719 51.353169,-0.301793 51.353898,-0.302271 51.354232,-0.302884 51.353855,-0.303021 51.353775,-0.303101 51.353735,-0.303065 51.353709,-0.303075 51.353691,-0.302665 51.353407,-0.303478 51.353000,-0.303102 51.352690,-0.303241 51.352632,-0.303554 51.352529,-0.303550 51.352525,-0.303703 51.352472,-0.303782 51.352441,-0.303817 51.352420,-0.303821 51.352415,-0.303859 51.352388,-0.303996 51.352294,-0.304156 51.352192,-0.304175 51.352178,-0.304223 51.352150,-0.304261 51.352131,-0.304387 51.352059)))
point: POINT (-0.302263 51.353064)
notes
entry-date: 2018-12-18
start-date: start-date must be a real date
end-date

Your data is missing a start-date.

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