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_034_G_001
name: G1
tree-preservation-order: undefined
TPO1999_034
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.529365 53.847052,-1.529439 53.847053,-1.529482 53.847045,-1.529551 53.847006,-1.529567 53.846986,-1.529550 53.846953,-1.529556 53.846943,-1.529615 53.846924,-1.529664 53.846925,-1.529755 53.846850,-1.529748 53.846818,-1.529698 53.846732,-1.529653 53.846720,-1.529608 53.846724,-1.529578 53.846740,-1.529552 53.846767,-1.529559 53.846785,-1.529588 53.846810,-1.529586 53.846825,-1.529558 53.846829,-1.529532 53.846818,-1.529469 53.846762,-1.529438 53.846757,-1.529359 53.846772,-1.529326 53.846792,-1.529317 53.846820,-1.529338 53.846854,-1.529379 53.846872,-1.529420 53.846879,-1.529417 53.846893,-1.529346 53.846905,-1.529312 53.846922,-1.529294 53.846948,-1.529302 53.846981,-1.529356 53.847028,-1.529365 53.847052)))
point: POINT (-1.52951 53.846881)
notes
entry-date: 2026-02-12
start-date: 1999-07-28
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.