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: ZZZZZWESRW847
name: Bucks County Council (Eton Rural District) Tree Preservation Order No.12 - 1951 made by Bucks. Count
tree-preservation-order: undefined
TPO/BCC/1951/12
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.608619 51.543625,-0.608591 51.543311,-0.608534 51.543221,-0.608493 51.543207,-0.608475 51.543204,-0.608478 51.543218,-0.608486 51.543285,-0.608496 51.543343,-0.608499 51.543386,-0.608507 51.543437,-0.608522 51.543560,-0.608533 51.543632,-0.608547 51.543744,-0.608551 51.543802,-0.608551 51.543833,-0.608546 51.543904,-0.608539 51.543946,-0.608521 51.544033,-0.608495 51.544117,-0.608450 51.544210,-0.608429 51.544252,-0.608266 51.544539,-0.608244 51.544582,-0.608179 51.544725,-0.608160 51.544782,-0.608140 51.544835,-0.608095 51.544932,-0.608091 51.544944,-0.608050 51.545113,-0.608042 51.545168,-0.608033 51.545215,-0.608060 51.545183,-0.608089 51.545063,-0.608253 51.544729,-0.608358 51.544528,-0.608418 51.544358,-0.608463 51.544244,-0.608571 51.544064,-0.608615 51.543966,-0.608631 51.543922,-0.608640 51.543882,-0.608630 51.543782,-0.608619 51.543625)))
point: POINT (-0.608432 51.54408)
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.