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: ZZZZZTESRW191
name: South Bucks Council (No. 12) Tree Preservation Order 1992; dated 10/11/92; made under Sections 198;
tree-preservation-order: undefined
TPO/SBDC/1992/12
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.490173 51.573327,-0.490188 51.573325,-0.490230 51.573314,-0.490255 51.573305,-0.490290 51.573288,-0.490311 51.573275,-0.490337 51.573252,-0.490345 51.573244,-0.490357 51.573228,-0.490366 51.573210,-0.490374 51.573183,-0.490376 51.573164,-0.490374 51.573145,-0.490365 51.573118,-0.490350 51.573093,-0.490334 51.573076,-0.490318 51.573062,-0.490298 51.573048,-0.490275 51.573035,-0.490240 51.573020,-0.490213 51.573012,-0.490170 51.573003,-0.490126 51.572999,-0.490110 51.572999,-0.490067 51.573001,-0.490053 51.573003,-0.490009 51.573011,-0.489970 51.573023,-0.489946 51.573034,-0.489912 51.573053,-0.489878 51.573082,-0.489854 51.573116,-0.489844 51.573144,-0.489842 51.573171,-0.489843 51.573181,-0.489855 51.573217,-0.489866 51.573234,-0.489880 51.573251,-0.489897 51.573266,-0.489915 51.573280,-0.489960 51.573304,-0.490013 51.573321,-0.490085 51.573331,-0.490115 51.573332,-0.490173 51.573327)))
point: POINT (-0.490109 51.573165)
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.