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: ZZZZZXESRW236
name: South Bucks District Council (No. 2) Tree Preservation Order 1990; dated 6/3/90; made under Sections
tree-preservation-order: undefined
TPO/SBDC/1990/02
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.591533 51.553605,-0.591552 51.553607,-0.591573 51.553607,-0.591611 51.553601,-0.591629 51.553595,-0.591645 51.553587,-0.591658 51.553578,-0.591669 51.553567,-0.591677 51.553556,-0.591681 51.553544,-0.591682 51.553531,-0.591680 51.553519,-0.591675 51.553507,-0.591666 51.553495,-0.591655 51.553485,-0.591641 51.553476,-0.591606 51.553463,-0.591491 51.553447,-0.591403 51.553442,-0.591383 51.553442,-0.591364 51.553445,-0.591346 51.553449,-0.591329 51.553455,-0.591301 51.553472,-0.591291 51.553482,-0.591284 51.553494,-0.591280 51.553506,-0.591279 51.553518,-0.591282 51.553530,-0.591288 51.553542,-0.591297 51.553553,-0.591323 51.553571,-0.591358 51.553582,-0.591447 51.553596,-0.591533 51.553605)))
point: POINT (-0.591482 51.553524)
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.