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: TPO1995_022_G_021
name: G21
tree-preservation-order: undefined
TPO1995_022
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.566135 53.837676,-1.566223 53.837664,-1.566254 53.837648,-1.566287 53.837619,-1.566305 53.837589,-1.566308 53.837543,-1.566292 53.837525,-1.566259 53.837513,-1.566079 53.837467,-1.565999 53.837430,-1.565923 53.837377,-1.565904 53.837352,-1.565926 53.837277,-1.565919 53.837220,-1.565900 53.837176,-1.565853 53.837142,-1.565757 53.837128,-1.565622 53.837144,-1.565495 53.837188,-1.565339 53.837263,-1.565292 53.837314,-1.565317 53.837372,-1.565342 53.837397,-1.565417 53.837442,-1.565495 53.837461,-1.565639 53.837476,-1.565740 53.837525,-1.565859 53.837600,-1.565990 53.837663,-1.566096 53.837682,-1.566135 53.837676)))
point: POINT (-1.565784 53.8374)
notes
entry-date: 2026-02-12
start-date: 1995-03-30
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.