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: ZZZZDVESXE385
name: The Chiltern District Council (High and Over, Highover Park, Amersham) Tree Preservation Order No 1
tree-preservation-order: undefined
TPO/1979/001
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.605485 51.666939,-0.605519 51.666629,-0.605285 51.666557,-0.605225 51.666537,-0.604862 51.666665,-0.605024 51.666793,-0.605028 51.666799,-0.605018 51.666828,-0.605018 51.666839,-0.605021 51.666845,-0.605035 51.666853,-0.605058 51.666860,-0.605083 51.666882,-0.605088 51.666912,-0.605088 51.666924,-0.605084 51.666935,-0.605078 51.666947,-0.605038 51.666990,-0.605083 51.667012,-0.605093 51.667015,-0.605116 51.667014,-0.605145 51.667007,-0.605182 51.666992,-0.605207 51.666987,-0.605255 51.666982,-0.605357 51.666967,-0.605384 51.666965,-0.605433 51.666966,-0.605442 51.666965,-0.605456 51.666962,-0.605468 51.666954,-0.605485 51.666939)))
point: POINT (-0.60524 51.666767)
notes
entry-date: 2010-02-18
start-date: 2010-02-18
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.