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: ZZZZZUESRW631
name: South Bucks District Council Tree Preservation Order No. 43; 2001 dated 25/9/2001. Confirmed 21/11/2
tree-preservation-order: undefined
TPO/SBDC/2001/43
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.680446 51.520937,-0.680466 51.520939,-0.680502 51.520936,-0.680525 51.520929,-0.680547 51.520916,-0.680560 51.520901,-0.680565 51.520886,-0.680566 51.520879,-0.680565 51.520871,-0.680560 51.520860,-0.680548 51.520846,-0.680531 51.520835,-0.680514 51.520828,-0.680494 51.520824,-0.680146 51.520785,-0.680132 51.520785,-0.680097 51.520794,-0.680089 51.520798,-0.680079 51.520804,-0.680064 51.520817,-0.680055 51.520836,-0.680055 51.520850,-0.680057 51.520857,-0.680065 51.520870,-0.680072 51.520878,-0.680082 51.520885,-0.680104 51.520895,-0.680134 51.520901,-0.680446 51.520937)))
point: POINT (-0.68031 51.520862)
notes
entry-date: 2017-07-04
start-date: 2017-07-04
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.