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: TPO1993_061_G_006
name: G6
tree-preservation-order: undefined
TPO1993_061
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.376531 53.934168,-1.376432 53.934185,-1.376384 53.934220,-1.376370 53.934252,-1.376394 53.934308,-1.376450 53.934377,-1.376451 53.934446,-1.376436 53.934501,-1.376444 53.934527,-1.376484 53.934568,-1.376584 53.934578,-1.376747 53.934475,-1.377007 53.934463,-1.377144 53.934448,-1.377179 53.934432,-1.377190 53.934407,-1.377165 53.934386,-1.377126 53.934371,-1.377009 53.934339,-1.377082 53.934288,-1.377114 53.934248,-1.377123 53.934167,-1.377106 53.934107,-1.377079 53.934087,-1.377013 53.934071,-1.376761 53.934076,-1.376702 53.934102,-1.376615 53.934159,-1.376531 53.934168)))
point: POINT (-1.376765 53.934305)
notes
entry-date: 2026-02-12
start-date: 1993-08-25
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.