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: ZZZZZWESRW945
name: Eton R.D.C. Tree Preservation Order No.11; 1968 dated 27/11/68 made under S.29 of the Town and Count
tree-preservation-order: undefined
TPO/BD/1968/11
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.668654 51.569325,-0.669235 51.569604,-0.669309 51.569633,-0.669947 51.569838,-0.670584 51.570008,-0.670858 51.570100,-0.671033 51.570142,-0.671131 51.570153,-0.671235 51.570209,-0.671277 51.570223,-0.671763 51.570286,-0.671943 51.570269,-0.672023 51.570270,-0.672085 51.570279,-0.672167 51.570324,-0.672217 51.570336,-0.673752 51.570490,-0.673835 51.570439,-0.673859 51.570416,-0.674260 51.569905,-0.674262 51.569890,-0.674141 51.569792,-0.674168 51.569768,-0.674262 51.569803,-0.674308 51.569804,-0.674342 51.569792,-0.674517 51.569573,-0.674619 51.569356,-0.674694 51.569234,-0.674795 51.569093,-0.674909 51.568776,-0.675004 51.568444,-0.675051 51.568183,-0.675089 51.568035,-0.675310 51.567443,-0.675397 51.567185,-0.675823 51.566324,-0.675847 51.566294,-0.675748 51.566355,-0.675688 51.566408,-0.675564 51.566549,-0.675504 51.566639,-0.675383 51.566887,-0.675290 51.567051,-0.674688 51.566634,-0.674278 51.566790,-0.673950 51.566898,-0.673193 51.567168,-0.670774 51.568087,-0.670702 51.568091,-0.668132 51.569036,-0.668583 51.569314,-0.668623 51.569309,-0.668654 51.569325)))
point: POINT (-0.672451 51.568748)
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.