Tree preservation zone

There is a problem

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

reference: TPO120.A1
name: Standing in the area A1 on the map.
tree-preservation-order: undefined
TPO120
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.882387 53.380592,-2.882677 53.380548,-2.882746 53.380528,-2.882793 53.380529,-2.883228 53.380464,-2.882439 53.379640,-2.882068 53.379265,-2.881820 53.379336,-2.881815 53.379329,-2.881733 53.379352,-2.880718 53.379653,-2.880541 53.379493,-2.880064 53.379676,-2.879602 53.379235,-2.879309 53.378902,-2.878931 53.379018,-2.878923 53.379033,-2.878639 53.379128,-2.878520 53.379208,-2.878604 53.379281,-2.878636 53.379272,-2.878799 53.379456,-2.878838 53.379461,-2.878870 53.379490,-2.878858 53.379509,-2.879480 53.380060,-2.879535 53.380051,-2.879561 53.380077,-2.879529 53.380101,-2.879994 53.380517,-2.880524 53.380308,-2.881065 53.380800,-2.881325 53.380752,-2.882387 53.380592)))
point: POINT (-2.880961 53.379945)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1973-06-25
start-date: 1973-09-12
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.