Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: TPO1999_045_G_004
name: G4
tree-preservation-order: undefined
TPO1999_045
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.639996 53.852164,-1.640095 53.852166,-1.640132 53.852159,-1.640170 53.852139,-1.640214 53.852104,-1.640270 53.852039,-1.640298 53.851999,-1.640310 53.851962,-1.640308 53.851927,-1.640286 53.851895,-1.640155 53.851869,-1.640146 53.851858,-1.640130 53.851740,-1.640128 53.851657,-1.640136 53.851608,-1.640152 53.851596,-1.640213 53.851597,-1.640355 53.851639,-1.640415 53.851641,-1.640436 53.851630,-1.640462 53.851594,-1.640462 53.851538,-1.640444 53.851497,-1.640013 53.851491,-1.639930 53.851495,-1.639902 53.851505,-1.639890 53.851522,-1.639870 53.851566,-1.639870 53.851673,-1.639916 53.852098,-1.639932 53.852131,-1.639996 53.852164)))
point: POINT (-1.640091 53.851798)
notes
entry-date: 2026-02-12
start-date: 1999-10-06
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.