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: ZZZZZTESRW107
name: South Bucks District Council (No.20) Tree Preservation Order 1995; dated 31/5/95; made under Section
tree-preservation-order: undefined
TPO/SBDC/1995/20
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.657643 51.601874,-0.657647 51.601925,-0.657698 51.602085,-0.657698 51.602091,-0.657704 51.602100,-0.657711 51.602105,-0.657717 51.602108,-0.657726 51.602108,-0.657737 51.602139,-0.657729 51.602144,-0.657771 51.602253,-0.657803 51.602321,-0.657817 51.602329,-0.657828 51.602349,-0.657821 51.602354,-0.657869 51.602457,-0.657886 51.602469,-0.657888 51.602472,-0.658109 51.602296,-0.658164 51.602250,-0.658210 51.602209,-0.658285 51.602139,-0.658391 51.602051,-0.658424 51.602027,-0.658500 51.602660,-0.658558 51.602648,-0.658669 51.602621,-0.658777 51.602600,-0.658816 51.602594,-0.658949 51.602582,-0.659103 51.602572,-0.659113 51.602508,-0.659128 51.602311,-0.659143 51.602153,-0.659147 51.601960,-0.658838 51.601952,-0.658838 51.601944,-0.658561 51.601929,-0.658551 51.601938,-0.658211 51.601916,-0.657643 51.601874)))
point: POINT (-0.65849 51.602204)
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.