Tree preservation zone

There is a problem

427 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: 86/00229/C
name: Norwood Park, Wade House Road, Shelf, Halifax
tree-preservation-order: undefined
86/00229/C
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.814592 53.753175,-1.814619 53.753309,-1.814806 53.753198,-1.814906 53.753245,-1.815239 53.753455,-1.815445 53.753327,-1.815766 53.753107,-1.815694 53.753082,-1.815637 53.753034,-1.815543 53.753039,-1.815467 53.753023,-1.815427 53.753002,-1.815349 53.752941,-1.815315 53.752869,-1.815269 53.752739,-1.815226 53.752680,-1.815089 53.752538,-1.815008 53.752535,-1.814610 53.752558,-1.814395 53.752607,-1.814240 53.752666,-1.814226 53.752508,-1.813400 53.752534,-1.813584 53.752890,-1.813589 53.753016,-1.813729 53.753078,-1.813927 53.753215,-1.814592 53.753175)))
point: POINT (-1.814546 53.752914)
notes: Ash, beech, blue spruce, elm, hawthorn, horse chestnut, sorbus, sycamore, tilia, yew
entry-date: 1987-01-09
start-date: 1987-01-09
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.