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: ZZZZZTESRW118
name: South Bucks District Council (No.16) Tree Preservation Order 1995 dated 3rd May 1995 made under Ss.1
tree-preservation-order: undefined
TPO/SBDC/1995/16
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.651055 51.609942,-0.651055 51.610403,-0.651097 51.610402,-0.651098 51.610396,-0.651146 51.610396,-0.651146 51.610402,-0.651211 51.610396,-0.651347 51.610399,-0.651399 51.610374,-0.651446 51.610336,-0.651484 51.610288,-0.651550 51.610179,-0.651570 51.610128,-0.651606 51.609794,-0.651601 51.609777,-0.651587 51.609768,-0.651592 51.609724,-0.651620 51.609692,-0.651636 51.609541,-0.651609 51.609534,-0.651609 51.609523,-0.651638 51.609512,-0.651638 51.609189,-0.651556 51.609188,-0.651557 51.609153,-0.651367 51.609147,-0.651147 51.609109,-0.651051 51.609110,-0.650975 51.609158,-0.651021 51.609185,-0.650886 51.609273,-0.650904 51.609320,-0.650969 51.609632,-0.650737 51.609635,-0.650733 51.609871,-0.651055 51.609942)))
point: POINT (-0.651254 51.609713)
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.