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: TPO1978_018_G_001
name: G1
tree-preservation-order: undefined
TPO1978_018
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.616570 53.886998,-1.616577 53.887006,-1.616655 53.887026,-1.616757 53.887030,-1.616810 53.887020,-1.616920 53.886983,-1.617105 53.886971,-1.617202 53.886949,-1.617230 53.886939,-1.617268 53.886882,-1.617288 53.886867,-1.617424 53.886830,-1.617447 53.886815,-1.617475 53.886775,-1.617463 53.886755,-1.617446 53.886745,-1.617361 53.886723,-1.617301 53.886709,-1.617170 53.886697,-1.617131 53.886708,-1.617101 53.886737,-1.617087 53.886764,-1.617082 53.886804,-1.617060 53.886831,-1.616916 53.886897,-1.616896 53.886901,-1.616833 53.886889,-1.616733 53.886844,-1.616630 53.886847,-1.616615 53.886857,-1.616577 53.886912,-1.616563 53.886973,-1.616570 53.886998)))
point: POINT (-1.617017 53.886876)
notes
entry-date: 2026-02-12
start-date: 1978-10-31
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.