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: ZZZZDVESXE722
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 (((-0.546289 51.601932,-0.546284 51.601953,-0.547691 51.601355,-0.547657 51.601311,-0.547610 51.601220,-0.547558 51.601157,-0.547504 51.601108,-0.547380 51.601029,-0.547221 51.600965,-0.547070 51.600932,-0.546965 51.600922,-0.546832 51.600923,-0.546352 51.600860,-0.545953 51.600817,-0.545769 51.600770,-0.545281 51.600909,-0.544955 51.600983,-0.544754 51.601041,-0.544521 51.601076,-0.544441 51.601097,-0.544386 51.601123,-0.544349 51.601152,-0.544199 51.601322,-0.544192 51.601340,-0.544191 51.601381,-0.544204 51.601421,-0.544222 51.601450,-0.544266 51.601489,-0.544349 51.601521,-0.544520 51.601541,-0.544631 51.601536,-0.544855 51.601497,-0.545662 51.601395,-0.545751 51.601400,-0.545834 51.601415,-0.545882 51.601439,-0.546003 51.601546,-0.546137 51.601634,-0.546294 51.601724,-0.546313 51.601756,-0.546316 51.601789,-0.546291 51.601882,-0.546289 51.601932)))
point: POINT (-0.546041 51.60126)
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.