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: ZZZZDVESXE677
name: The Bucks County Council (Chesham Urban District) Tree Preservation Order No 2 - 1956 Confirmed by M
tree-preservation-order: undefined
TPO/1956/002
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.582500 51.694179,-0.582182 51.694215,-0.582090 51.694270,-0.582078 51.694311,-0.582079 51.694414,-0.582269 51.694441,-0.582446 51.694448,-0.582699 51.694445,-0.582821 51.694421,-0.582935 51.694329,-0.583068 51.694196,-0.583238 51.694095,-0.583513 51.693984,-0.584081 51.693773,-0.584859 51.693446,-0.585304 51.693279,-0.585501 51.693166,-0.585774 51.692941,-0.585960 51.692776,-0.586083 51.692619,-0.586139 51.692516,-0.586241 51.692280,-0.586343 51.691930,-0.586430 51.691544,-0.586380 51.691524,-0.586428 51.691458,-0.586449 51.691398,-0.586485 51.691339,-0.586569 51.691145,-0.586442 51.691098,-0.586319 51.691104,-0.586239 51.691131,-0.586185 51.691240,-0.586016 51.691979,-0.585928 51.692277,-0.585796 51.692547,-0.585660 51.692724,-0.585385 51.692929,-0.585169 51.693062,-0.584617 51.693305,-0.582945 51.693927,-0.582647 51.694125,-0.582500 51.694179)))
point: POINT (-0.584681 51.693103)
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.