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: ZZZZDVESXE683
name: The Bucks County Council (Amersham Rural District) Tree Preservation Order No 3 - 1955 Confirmed by
tree-preservation-order: undefined
TPO/1955/003
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.574307 51.602835,-0.574137 51.602939,-0.574422 51.603058,-0.574543 51.602976,-0.574767 51.602817,-0.574869 51.602715,-0.575063 51.602584,-0.575137 51.602529,-0.575164 51.602506,-0.575181 51.602498,-0.575198 51.602494,-0.575315 51.602480,-0.575385 51.602388,-0.575411 51.602356,-0.575445 51.602319,-0.575497 51.602273,-0.575544 51.602237,-0.575581 51.602211,-0.575613 51.602194,-0.575616 51.602191,-0.575493 51.602146,-0.575480 51.602152,-0.575430 51.602177,-0.575361 51.602216,-0.575221 51.602302,-0.575151 51.602340,-0.575130 51.602347,-0.575010 51.602395,-0.574925 51.602436,-0.574771 51.602523,-0.574763 51.602518,-0.574681 51.602582,-0.574669 51.602587,-0.574606 51.602635,-0.574476 51.602720,-0.574349 51.602808,-0.574307 51.602835)))
point: POINT (-0.574834 51.602629)
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.