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: ZZZZZTESRW119
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 (((-0.651586 51.608784,-0.651604 51.608784,-0.651597 51.608748,-0.651585 51.608748,-0.651576 51.608718,-0.651586 51.608714,-0.651525 51.608463,-0.651457 51.608297,-0.650985 51.608364,-0.650974 51.608333,-0.650948 51.608337,-0.650940 51.608319,-0.650990 51.608311,-0.650984 51.608295,-0.650973 51.608297,-0.650960 51.608262,-0.651052 51.608250,-0.651047 51.608234,-0.651004 51.608197,-0.650928 51.608051,-0.651298 51.607975,-0.651203 51.607773,-0.651130 51.607530,-0.651092 51.607335,-0.651078 51.607165,-0.651081 51.606979,-0.651060 51.606964,-0.651062 51.606924,-0.651080 51.606914,-0.651084 51.606901,-0.651095 51.606650,-0.651120 51.606407,-0.651109 51.606373,-0.651082 51.606354,-0.651029 51.606347,-0.650665 51.606391,-0.650381 51.606444,-0.650112 51.606521,-0.649627 51.606699,-0.650191 51.607117,-0.650272 51.607245,-0.650019 51.607356,-0.650418 51.607721,-0.650476 51.607784,-0.650664 51.607914,-0.650612 51.607976,-0.650586 51.608033,-0.650543 51.608070,-0.650310 51.608149,-0.649801 51.608393,-0.649808 51.608401,-0.650398 51.608808,-0.651586 51.608784)))
point: POINT (-0.650662 51.607622)
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.