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: TPO1985_023_G_030
name: G30
tree-preservation-order: undefined
TPO1985_023
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.440310 53.762652,-1.440414 53.762700,-1.440760 53.762826,-1.440855 53.762845,-1.440920 53.762835,-1.440968 53.762802,-1.440983 53.762775,-1.440976 53.762750,-1.440870 53.762667,-1.440686 53.762588,-1.440251 53.762437,-1.439970 53.762298,-1.439514 53.762092,-1.439240 53.761958,-1.439051 53.761904,-1.439008 53.761903,-1.438979 53.761919,-1.438933 53.761993,-1.438940 53.762026,-1.439027 53.762051,-1.439345 53.762173,-1.439679 53.762328,-1.440160 53.762581,-1.440310 53.762652)))
point: POINT (-1.44 53.762397)
notes
entry-date: 2026-02-12
start-date: 1985-10-08
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.