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_035
name: G35
tree-preservation-order: undefined
TPO1985_023
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.437868 53.766891,-1.437877 53.766880,-1.437696 53.766684,-1.437657 53.766635,-1.437682 53.766628,-1.437434 53.766325,-1.437298 53.766126,-1.437174 53.765905,-1.437142 53.765884,-1.437082 53.765884,-1.437045 53.765889,-1.436999 53.765921,-1.437008 53.765967,-1.437371 53.766490,-1.437588 53.766726,-1.437715 53.766840,-1.437862 53.767019,-1.438103 53.767277,-1.438206 53.767415,-1.438293 53.767456,-1.438367 53.767467,-1.438406 53.767448,-1.438392 53.767391,-1.438232 53.767220,-1.438105 53.767105,-1.437989 53.767026,-1.437868 53.766891)))
point: POINT (-1.437638 53.766651)
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.