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: ZZZZZRESRW899
name: Bucks. County Council (Beaconsfield Urban District) Tree Preservation Order No.16; 1951; made under
tree-preservation-order: undefined
TPO/BCC/1951/16
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.630843 51.621417,-0.631218 51.621131,-0.631388 51.620992,-0.631750 51.620665,-0.631827 51.620584,-0.631461 51.620450,-0.631248 51.620396,-0.630994 51.620349,-0.630967 51.620338,-0.630926 51.620299,-0.630918 51.620270,-0.630948 51.620203,-0.630989 51.620144,-0.630995 51.620119,-0.630972 51.620091,-0.630901 51.620068,-0.630634 51.620011,-0.630415 51.619953,-0.629738 51.619843,-0.629526 51.619821,-0.628785 51.619680,-0.628589 51.619633,-0.628572 51.619673,-0.628525 51.619731,-0.628372 51.619895,-0.628250 51.620001,-0.628135 51.620086,-0.628049 51.620163,-0.627995 51.620223,-0.627934 51.620317,-0.627794 51.620588,-0.627792 51.620601,-0.628001 51.620737,-0.628193 51.620825,-0.628279 51.620855,-0.628525 51.620902,-0.629457 51.621026,-0.629905 51.621152,-0.630340 51.621264,-0.630793 51.621423,-0.630843 51.621417)))
point: POINT (-0.629745 51.620513)
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.