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: ZZZZZTESRW174
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 (((-0.645521 51.603388,-0.645530 51.603377,-0.645534 51.603368,-0.645538 51.603349,-0.645539 51.603340,-0.645534 51.603320,-0.645526 51.603309,-0.645513 51.603296,-0.645491 51.603281,-0.645473 51.603273,-0.645448 51.603266,-0.645430 51.603264,-0.645254 51.603264,-0.645230 51.603265,-0.645211 51.603268,-0.645189 51.603274,-0.645155 51.603294,-0.645137 51.603318,-0.645130 51.603338,-0.645129 51.603351,-0.645133 51.603364,-0.645143 51.603379,-0.645158 51.603390,-0.645197 51.603407,-0.645221 51.603413,-0.645295 51.603416,-0.645430 51.603416,-0.645459 51.603414,-0.645484 51.603408,-0.645505 51.603399,-0.645521 51.603388)))
point: POINT (-0.645335 51.60334)
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.