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: ZZZZZTESRW212
name: South Bucks District Council (No.1) Tree Preservation Order 1981 dated 18/3/81 under Ss.60 & 61 of t
tree-preservation-order: undefined
TPO/SBDC/1981/01
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.497975 51.582931,-0.497674 51.582860,-0.497483 51.582807,-0.497314 51.582757,-0.497135 51.582700,-0.496996 51.582646,-0.496852 51.582581,-0.496782 51.582547,-0.496716 51.582511,-0.496608 51.582448,-0.496419 51.582312,-0.496322 51.582233,-0.496281 51.582225,-0.496239 51.582226,-0.496226 51.582245,-0.496223 51.582258,-0.496223 51.582269,-0.496226 51.582284,-0.496306 51.582348,-0.496369 51.582396,-0.496495 51.582485,-0.496602 51.582548,-0.496669 51.582584,-0.496739 51.582618,-0.496882 51.582683,-0.497022 51.582737,-0.497200 51.582794,-0.497369 51.582844,-0.497561 51.582897,-0.497935 51.582985,-0.497958 51.582985,-0.497977 51.582980,-0.497990 51.582968,-0.497994 51.582954,-0.497992 51.582946,-0.497987 51.582939,-0.497975 51.582931)))
point: POINT (-0.496999 51.58264)
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.