Tree preservation zone

There is a problem

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

reference: TPO255.A1
name: The grounds and playingfields located at FL Calder College, Dowsefield Lane.
tree-preservation-order: undefined
TPO255
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.884119 53.376788,-2.884141 53.376801,-2.884145 53.376799,-2.884169 53.376813,-2.884338 53.376919,-2.884694 53.377135,-2.884895 53.377259,-2.885770 53.376883,-2.885844 53.376849,-2.885898 53.376884,-2.885971 53.376940,-2.886471 53.377367,-2.886597 53.377472,-2.887000 53.377819,-2.887207 53.377993,-2.887459 53.378211,-2.887638 53.378363,-2.888060 53.378728,-2.888078 53.378746,-2.888084 53.378736,-2.888468 53.378445,-2.888527 53.378406,-2.888803 53.378236,-2.889005 53.378117,-2.889086 53.378071,-2.889176 53.378025,-2.889246 53.377997,-2.889370 53.377953,-2.889448 53.377928,-2.889888 53.377779,-2.889836 53.377731,-2.889754 53.377649,-2.889532 53.377436,-2.889263 53.377173,-2.888626 53.376558,-2.888283 53.376221,-2.887819 53.375770,-2.887737 53.375692,-2.887422 53.375384,-2.887314 53.375281,-2.887104 53.375320,-2.886531 53.375420,-2.886333 53.375454,-2.885854 53.375529,-2.885606 53.375571,-2.884954 53.375687,-2.883517 53.375789,-2.883161 53.375812,-2.883083 53.375849,-2.882755 53.375998,-2.883017 53.376163,-2.884066 53.376816,-2.884119 53.376788)))
point: POINT (-2.886697 53.376747)
notes: The several tree of whatever species situated within area A1 on map.
entry-date: 1992-08-14
start-date: 1992-10-13
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.