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: ZZZZDVESXE724
name: The Bucks County Council (Amersham and Eton Rural Districts) Tree Preservation Order No 5 - 1951 Con
tree-preservation-order: undefined
TPO/1951/005
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.547691 51.601355,-0.546284 51.601955,-0.546267 51.601977,-0.546227 51.601995,-0.546068 51.602007,-0.545235 51.602365,-0.545303 51.602392,-0.545403 51.602446,-0.545181 51.602545,-0.544385 51.602485,-0.543609 51.602384,-0.542732 51.602408,-0.542018 51.602327,-0.541973 51.602283,-0.540091 51.603848,-0.540749 51.604703,-0.541764 51.605981,-0.543300 51.605435,-0.543827 51.605239,-0.544186 51.605566,-0.544217 51.605557,-0.546280 51.604875,-0.546606 51.604557,-0.546732 51.604459,-0.546849 51.604388,-0.547502 51.604052,-0.548053 51.603856,-0.549797 51.603191,-0.549500 51.602949,-0.549358 51.602847,-0.548846 51.602538,-0.548260 51.602035,-0.548134 51.601913,-0.548049 51.601815,-0.547691 51.601355)))
point: POINT (-0.544577 51.603668)
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.