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: ZZZZZVESRW021
name: South Bucks District Council (No. 1) Tree Preservation Order 1999; dated 16/7/99; made under Section
tree-preservation-order: undefined
TPO/SBDC/1999/01
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.592369 51.556145,-0.592347 51.556127,-0.592325 51.556112,-0.592307 51.556102,-0.592279 51.556092,-0.592239 51.556085,-0.592220 51.556084,-0.592204 51.556084,-0.592191 51.556087,-0.592179 51.556092,-0.592160 51.556103,-0.592152 51.556112,-0.592145 51.556123,-0.592143 51.556136,-0.592151 51.556157,-0.592157 51.556165,-0.592167 51.556176,-0.592185 51.556188,-0.592200 51.556196,-0.592218 51.556203,-0.592267 51.556212,-0.592292 51.556212,-0.592312 51.556207,-0.592334 51.556199,-0.592352 51.556186,-0.592362 51.556177,-0.592368 51.556169,-0.592370 51.556158,-0.592369 51.556145)))
point: POINT (-0.592254 51.556148)
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.