Tree preservation zone

There is a problem

365 entries with tree-protection-order field must match the reference field in the tree protection order

reference: IB84NVDNBB000
name: Land Off Hallen Road Adjacent To Moorgrove Wood Henbury Bristol
tree-preservation-order: undefined
406
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-2.637159 51.507522,-2.637109 51.507573,-2.637076 51.507627,-2.637012 51.507689,-2.636986 51.507729,-2.636869 51.507833,-2.636770 51.507908,-2.636604 51.508086,-2.636564 51.508118,-2.636535 51.508170,-2.636409 51.508283,-2.636376 51.508342,-2.636343 51.508357,-2.636315 51.508387,-2.636328 51.508405,-2.636371 51.508413,-2.636475 51.508377,-2.636533 51.508335,-2.636592 51.508278,-2.636784 51.508134,-2.636874 51.508050,-2.636905 51.508031,-2.637214 51.507767,-2.637287 51.507679,-2.637382 51.507603,-2.637471 51.507500,-2.637497 51.507446,-2.637480 51.507419,-2.637428 51.507394,-2.637336 51.507387,-2.637268 51.507405,-2.637224 51.507444,-2.637159 51.507522)))
point: POINT (-2.636962 51.507855)
notes: HAWTHORN - Crataegus monogyna,HAZEL - Corrylus avellana,OAK - Quercus robur,ASH - Fraxinus excelsior
organisation
entry-date: 2005-02-01
start-date: 2005-02-01
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.