Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: 9/GOD G2
name: On the east side of and adjoining Bletchingley Lane extending from Harewood House Lodge to the Bell Inn in the parish of Bletchingley
tree-preservation-order: undefined
9/GOD
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-0.097557 51.201456,-0.097852 51.201408,-0.097808 51.200717,-0.097728 51.200345,-0.097701 51.200087,-0.097691 51.199804,-0.097719 51.199639,-0.097862 51.199007,-0.097908 51.198771,-0.097920 51.198196,-0.097968 51.197773,-0.098002 51.197619,-0.098018 51.197503,-0.098058 51.197367,-0.098093 51.197283,-0.098173 51.197175,-0.098238 51.197102,-0.098422 51.196946,-0.098876 51.196634,-0.099161 51.196471,-0.099367 51.196333,-0.099487 51.196220,-0.099566 51.196072,-0.099694 51.195768,-0.099742 51.195604,-0.099875 51.195378,-0.099814 51.195364,-0.099810 51.195355,-0.099591 51.195277,-0.099547 51.195472,-0.099386 51.195847,-0.099028 51.196182,-0.098280 51.196709,-0.097804 51.197186,-0.097585 51.198096,-0.097461 51.198472,-0.097526 51.198980,-0.097356 51.199694,-0.097343 51.199896,-0.097355 51.200152,-0.097584 51.201274,-0.097557 51.201456)))
point: POINT (-0.098112 51.19828)
notes
organisation
entry-date: 1951-04-20
start-date: 1951-04-20
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.