Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: TPO262
name: Laburnum Cottage
tree-preservation-order: undefined
South Killingholme 1970
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-0.262038 53.627830,-0.262077 53.627808,-0.262089 53.627773,-0.262091 53.627737,-0.262082 53.627691,-0.262072 53.627672,-0.262038 53.627672,-0.262009 53.627685,-0.261924 53.627715,-0.261931 53.627727,-0.261719 53.627770,-0.261175 53.627876,-0.260640 53.628004,-0.260375 53.628063,-0.260335 53.628078,-0.260280 53.628091,-0.260213 53.628103,-0.260074 53.628119,-0.260070 53.628132,-0.260086 53.628138,-0.260113 53.628145,-0.260173 53.628143,-0.260250 53.628125,-0.260366 53.628087,-0.260607 53.628062,-0.260815 53.628029,-0.260997 53.627983,-0.261217 53.627935,-0.261579 53.627862,-0.261799 53.627810,-0.261871 53.627782,-0.261930 53.627796,-0.261978 53.627829,-0.262038 53.627830)))
point: POINT (-0.261266 53.627897)
notes
entry-date: 1971-02-02
start-date: 1970-12-10
end-date

Your data is missing a tree-preservation-order.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.