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: ZZZZDVESXE709
name: The Bucks County Council (Amersham Rural District) Tree Preservation Order No 5 - 1952 Confirmed by
tree-preservation-order: undefined
TPO/1952/005
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.589955 51.606898,-0.589595 51.606987,-0.589619 51.607170,-0.589843 51.607510,-0.589895 51.607657,-0.590052 51.607699,-0.591434 51.608097,-0.591552 51.607967,-0.591592 51.607917,-0.591600 51.607905,-0.591626 51.607874,-0.591642 51.607859,-0.591660 51.607835,-0.591666 51.607823,-0.591668 51.607808,-0.591671 51.607802,-0.591670 51.607790,-0.591663 51.607782,-0.591622 51.607747,-0.591579 51.607705,-0.591570 51.607700,-0.590960 51.607255,-0.590487 51.606903,-0.590360 51.606815,-0.590040 51.606857,-0.590023 51.606863,-0.589973 51.606891,-0.589955 51.606898)))
point: POINT (-0.590571 51.607451)
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.