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: ZZZZZTESRW178
name: South Bucks Council (No. 10) Tree Preservation Order 1991; dated 4/6/91; made under Sections 198;199
tree-preservation-order: undefined
TPO/SBDC/1991/10
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.644904 51.603786,-0.645277 51.603539,-0.645139 51.603401,-0.644892 51.603410,-0.644823 51.603402,-0.644721 51.603369,-0.644628 51.603308,-0.644606 51.603231,-0.644611 51.603163,-0.644671 51.603015,-0.644682 51.602930,-0.644629 51.602792,-0.644621 51.602759,-0.644623 51.602696,-0.644649 51.602646,-0.644643 51.602536,-0.644690 51.602499,-0.644508 51.602391,-0.644497 51.602397,-0.644514 51.602442,-0.644520 51.602497,-0.644493 51.602679,-0.644545 51.602796,-0.644553 51.602853,-0.644550 51.602914,-0.644546 51.602935,-0.644419 51.603176,-0.644391 51.603269,-0.644389 51.603323,-0.644592 51.603563,-0.644641 51.603643,-0.644740 51.603764,-0.644787 51.603787,-0.644904 51.603786)))
point: POINT (-0.644736 51.603307)
notes
organisation
entry-date: 2017-07-04
start-date: 2017-07-04
end-date

Your dataset is missing the tree-preservation-order column.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.