Tree preservation zone

There is a problem

reference: 001/72 A1
name: Tree Preservation Order number TPO 1.72 Stukeley Park, Great Stukeley
tree-preservation-order: 001/72
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-0.206418 52.359341,-0.206448 52.359356,-0.206489 52.359356,-0.207018 52.359160,-0.208059 52.358797,-0.208231 52.358652,-0.208523 52.358355,-0.208728 52.358088,-0.208747 52.358040,-0.208806 52.357981,-0.209195 52.357619,-0.209681 52.357268,-0.209805 52.357169,-0.209853 52.357120,-0.209981 52.356910,-0.210037 52.356839,-0.209842 52.356693,-0.210051 52.356571,-0.210186 52.356670,-0.210466 52.356378,-0.210452 52.356341,-0.209965 52.355949,-0.209849 52.355841,-0.209814 52.355826,-0.209273 52.355482,-0.208996 52.355271,-0.208630 52.354927,-0.208418 52.354711,-0.208334 52.354772,-0.208281 52.354825,-0.208002 52.354656,-0.207902 52.354803,-0.207778 52.355110,-0.207702 52.355264,-0.207619 52.355481,-0.207488 52.355931,-0.207369 52.356407,-0.207305 52.356579,-0.207217 52.356778,-0.207170 52.356862,-0.207016 52.357047,-0.206838 52.357383,-0.206419 52.357946,-0.206387 52.358191,-0.206395 52.358416,-0.206414 52.358609,-0.206350 52.358835,-0.206339 52.358974,-0.206351 52.359002,-0.206340 52.359265,-0.206418 52.359341)))
point: POINT (-0.208185 52.357034)
notes
entry-date: 2007-01-25
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