Tree preservation zone

There is a problem

reference: 154
name
tree-preservation-order: Barwell Business Park Leatherhead Road Chessington KT9 2NY
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.313116 51.350004,-0.313120 51.349987,-0.312890 51.349957,-0.312856 51.350054,-0.312813 51.350139,-0.312781 51.350218,-0.312722 51.350400,-0.312692 51.350512,-0.312659 51.350713,-0.312640 51.350751,-0.312593 51.350775,-0.312535 51.350784,-0.312412 51.350786,-0.312222 51.350784,-0.312195 51.350798,-0.312201 51.350803,-0.312219 51.350824,-0.312358 51.350819,-0.312453 51.350827,-0.312516 51.350865,-0.312550 51.350913,-0.312560 51.350948,-0.312550 51.351016,-0.312524 51.351051,-0.312463 51.351104,-0.312378 51.351122,-0.312226 51.351126,-0.312103 51.351117,-0.311995 51.351111,-0.311862 51.351079,-0.311734 51.351051,-0.311624 51.351046,-0.311526 51.351051,-0.311455 51.351075,-0.311392 51.351111,-0.311347 51.351145,-0.311340 51.351184,-0.312736 51.351330,-0.313027 51.350321,-0.313116 51.350004)))
point: POINT (-0.31252 51.35082)
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