Tree preservation zone

There is a problem

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

reference: TPO121.A1
name: Standing within the area numbered A1 on the map.
tree-preservation-order: undefined
TPO121
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.871246 53.383101,-2.871615 53.383210,-2.871449 53.383363,-2.871345 53.383470,-2.871278 53.383555,-2.871259 53.383549,-2.871174 53.383623,-2.870820 53.383880,-2.870515 53.384177,-2.870450 53.384256,-2.871072 53.384438,-2.871464 53.384539,-2.871871 53.384628,-2.872172 53.384674,-2.872282 53.384403,-2.872203 53.384243,-2.873039 53.384434,-2.873413 53.384509,-2.873506 53.384302,-2.873439 53.384291,-2.873283 53.384166,-2.872984 53.384026,-2.872899 53.383965,-2.872921 53.383773,-2.872788 53.383576,-2.872642 53.383396,-2.872452 53.383194,-2.872313 53.383061,-2.872159 53.382946,-2.872117 53.382933,-2.871850 53.382993,-2.871789 53.383068,-2.871370 53.382959,-2.871202 53.382903,-2.871118 53.383008,-2.871131 53.383033,-2.871106 53.383059,-2.871246 53.383101)))
point: POINT (-2.871933 53.38388)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1973-07-04
start-date: 1974-02-06
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.