Tree preservation zone

There is a problem

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

reference: TPO260.C
name
tree-preservation-order: undefined
TPO260
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.889218 53.368738,-2.888698 53.368917,-2.888657 53.368943,-2.888640 53.368971,-2.888646 53.369000,-2.888678 53.369046,-2.888995 53.369455,-2.889075 53.369577,-2.889213 53.369546,-2.888860 53.369118,-2.888767 53.368980,-2.888791 53.368957,-2.888850 53.368933,-2.889086 53.368864,-2.889535 53.368741,-2.889496 53.368697,-2.889953 53.368583,-2.890197 53.368509,-2.890724 53.368322,-2.890569 53.368213,-2.890427 53.368285,-2.890227 53.368370,-2.889281 53.368708,-2.889290 53.368718,-2.889218 53.368738)))
point: POINT (-2.889553 53.368772)
notes: The several tree of whatever species situated within area C on map.
organisation
entry-date: 1994-06-03
start-date: 1994-08-02
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.