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: ZZZZDVESXE714
name: The Bucks County Council (Amersham Rural District) Tree Preservation Order No 11 - 1951 Confirmed by
tree-preservation-order: undefined
TPO/1951/011
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.600650 51.689721,-0.600562 51.689381,-0.600212 51.689382,-0.599974 51.689412,-0.599828 51.689397,-0.599720 51.689366,-0.598758 51.689663,-0.598505 51.689786,-0.598424 51.689835,-0.598367 51.689769,-0.598259 51.689764,-0.598256 51.689895,-0.598238 51.689958,-0.598198 51.690033,-0.598043 51.690170,-0.597741 51.690385,-0.597567 51.690489,-0.597338 51.690609,-0.597342 51.690614,-0.597546 51.690596,-0.598368 51.690710,-0.599090 51.690856,-0.599633 51.690992,-0.600016 51.691069,-0.600318 51.691117,-0.600661 51.691151,-0.600954 51.691250,-0.601544 51.691369,-0.601265 51.690968,-0.600850 51.690537,-0.600858 51.690540,-0.600831 51.690422,-0.600650 51.689721)))
point: POINT (-0.59963 51.690315)
notes
organisation
entry-date: 2014-04-10
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.