Tree preservation zone

There is a problem

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

reference: TPO048.A1
name: Within the area of the Forty Pits.
tree-preservation-order: undefined
TPO048
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.899521 53.376922,-2.899515 53.376920,-2.899536 53.376898,-2.899519 53.376895,-2.899414 53.376739,-2.899060 53.376654,-2.899015 53.376591,-2.898841 53.376543,-2.898659 53.376513,-2.898207 53.376507,-2.898107 53.376507,-2.897968 53.376526,-2.897935 53.376567,-2.897070 53.376657,-2.896083 53.376774,-2.895991 53.376794,-2.895910 53.376827,-2.895788 53.376921,-2.896468 53.377264,-2.896504 53.377275,-2.896104 53.377552,-2.896003 53.377633,-2.896142 53.377725,-2.896267 53.377785,-2.896777 53.377910,-2.897044 53.377988,-2.897272 53.378072,-2.897420 53.378115,-2.897633 53.377887,-2.897661 53.377875,-2.897773 53.377868,-2.897803 53.377882,-2.897829 53.377884,-2.898144 53.377832,-2.898608 53.377993,-2.898909 53.377727,-2.899671 53.376976,-2.899521 53.376922)))
point: POINT (-2.897754 53.377234)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1971-01-19
start-date: 1971-06-30
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.