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: ZZZZDUESXE881
name: The Chiltern District Council (Land at Weedon, Copperkins Lane, Chesham Bois) Tree Preservation Ord
tree-preservation-order: undefined
TPO/1987/022
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.621732 51.685890,-0.621533 51.686125,-0.621236 51.686043,-0.620948 51.685989,-0.620801 51.685983,-0.620566 51.685993,-0.620491 51.686002,-0.620395 51.686026,-0.620556 51.686220,-0.620848 51.686126,-0.621340 51.686342,-0.621346 51.686337,-0.621470 51.686386,-0.621249 51.686594,-0.621204 51.686589,-0.620630 51.686337,-0.620351 51.686565,-0.620529 51.686595,-0.620812 51.686662,-0.620875 51.686688,-0.621041 51.686785,-0.621104 51.686807,-0.621153 51.686755,-0.621199 51.686747,-0.621295 51.686773,-0.621479 51.686848,-0.621582 51.686685,-0.621743 51.686459,-0.621526 51.686355,-0.621780 51.686056,-0.621808 51.686026,-0.621870 51.685982,-0.621732 51.685890)))
point: POINT (-0.621135 51.686369)
notes
organisation
entry-date: 2010-02-18
start-date: 2010-02-18
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.