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: 1949
name
tree-preservation-order: undefined
Oakhill Grove, Upper Brighton Road, Walpole Road and Mountcombe Close Surbiton
tree-preservation-zone-type: T
geometry: MULTIPOLYGON (((-0.303166 51.388244,-0.303166 51.388235,-0.303159 51.388217,-0.302944 51.388083,-0.302475 51.388365,-0.302102 51.388587,-0.302292 51.388707,-0.302432 51.388792,-0.302441 51.388799,-0.302480 51.388775,-0.302409 51.388744,-0.302402 51.388699,-0.302420 51.388650,-0.302704 51.388544,-0.302691 51.388525,-0.302688 51.388518,-0.302688 51.388507,-0.302713 51.388460,-0.302726 51.388445,-0.302708 51.388434,-0.302713 51.388420,-0.302698 51.388418,-0.302705 51.388406,-0.302750 51.388414,-0.302778 51.388415,-0.302819 51.388409,-0.302827 51.388405,-0.302831 51.388400,-0.302874 51.388409,-0.302873 51.388417,-0.302878 51.388421,-0.302941 51.388433,-0.302952 51.388432,-0.302962 51.388429,-0.302965 51.388426,-0.302993 51.388372,-0.303000 51.388373,-0.303142 51.388285,-0.303156 51.388267,-0.303164 51.388252,-0.303166 51.388244)))
point: POINT (-0.30265 51.38841)
notes
entry-date: 2018-12-18
start-date
end-date

Your data is missing a tree-preservation-order.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.