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: TPO1953_001PUD_G_021
name: G21
tree-preservation-order: undefined
TPO1953_001PUD
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.696770 53.805759,-1.696272 53.804765,-1.696245 53.804697,-1.696212 53.804703,-1.696207 53.804696,-1.696209 53.804657,-1.696201 53.804628,-1.696084 53.804391,-1.695955 53.804412,-1.695884 53.804435,-1.695783 53.804496,-1.695716 53.804564,-1.695674 53.804643,-1.695668 53.804688,-1.695680 53.804763,-1.695697 53.804813,-1.695805 53.804810,-1.695919 53.804823,-1.696040 53.804853,-1.696139 53.804893,-1.696186 53.804919,-1.696269 53.804986,-1.696306 53.805036,-1.696344 53.805110,-1.696359 53.805146,-1.696387 53.805286,-1.696382 53.805343,-1.696359 53.805442,-1.696294 53.805583,-1.696295 53.805610,-1.696337 53.805680,-1.696427 53.805777,-1.696492 53.805796,-1.696600 53.805803,-1.696695 53.805786,-1.696770 53.805759)))
point: POINT (-1.696225 53.805053)
notes
entry-date: 2026-02-12
start-date: 1953-01-22
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.