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: ZZZZDUESXE164
name: The Chiltern District Council (Land at Ashley House and Haere Mai, 6 and 8 Over Hampden, Prestwood)
tree-preservation-order: undefined
TPO/1993/018
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.742185 51.705073,-0.742186 51.705090,-0.742191 51.705108,-0.742199 51.705126,-0.742211 51.705145,-0.742229 51.705163,-0.742256 51.705182,-0.742285 51.705195,-0.742314 51.705202,-0.742358 51.705206,-0.742400 51.705204,-0.742420 51.705201,-0.742444 51.705195,-0.742481 51.705179,-0.742502 51.705165,-0.742514 51.705155,-0.742533 51.705132,-0.742539 51.705119,-0.742546 51.705097,-0.742547 51.705078,-0.742540 51.705052,-0.742531 51.705035,-0.742513 51.705015,-0.742495 51.705001,-0.742474 51.704990,-0.742450 51.704980,-0.742424 51.704973,-0.742375 51.704967,-0.742340 51.704968,-0.742303 51.704974,-0.742283 51.704979,-0.742264 51.704986,-0.742242 51.704997,-0.742219 51.705013,-0.742199 51.705035,-0.742188 51.705058,-0.742185 51.705073)))
point: POINT (-0.742366 51.705086)
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.