Tree preservation zone

There is a problem

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

reference: TPO076.A1
name: Within the grounds of Knolle Park.
tree-preservation-order: undefined
TPO076
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.874021 53.380728,-2.873696 53.380829,-2.873775 53.380929,-2.874092 53.380836,-2.874136 53.380892,-2.874127 53.380895,-2.874309 53.381136,-2.874324 53.381170,-2.874303 53.381200,-2.874074 53.381318,-2.874285 53.381594,-2.874498 53.381897,-2.874611 53.382062,-2.874929 53.382564,-2.874942 53.382574,-2.875077 53.382606,-2.875151 53.382601,-2.877060 53.381983,-2.877069 53.381976,-2.877070 53.381960,-2.877114 53.381946,-2.877150 53.381952,-2.877516 53.381833,-2.877450 53.381755,-2.877455 53.381749,-2.877164 53.381429,-2.877391 53.381385,-2.876162 53.380059,-2.874021 53.380728)))
point: POINT (-2.875675 53.381341)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1971-04-08
start-date: 1971-08-04
end-date

Your dataset is missing the tree-preservation-order column.

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

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