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: ZZZZZWESRW962
name: Beaconsfield District Council (No.10) Tree Preservation Order 1974; dated 31/12/74; under Sections 6
tree-preservation-order: undefined
TPO/BD/1974/10
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.662657 51.489593,-0.662759 51.489534,-0.662898 51.489431,-0.663008 51.489332,-0.663045 51.489290,-0.663056 51.489256,-0.663057 51.489225,-0.663040 51.489194,-0.662977 51.489164,-0.662902 51.489148,-0.662717 51.489146,-0.662455 51.489183,-0.662412 51.489196,-0.662383 51.489215,-0.662382 51.489249,-0.662401 51.489320,-0.662429 51.489354,-0.662448 51.489414,-0.662450 51.489468,-0.662432 51.489568,-0.662440 51.489593,-0.662474 51.489623,-0.662548 51.489639,-0.662606 51.489630,-0.662637 51.489614,-0.662657 51.489593)),((-0.663893 51.488593,-0.663924 51.488565,-0.663938 51.488533,-0.663926 51.488483,-0.663898 51.488454,-0.663831 51.488426,-0.663660 51.488390,-0.663485 51.488379,-0.663384 51.488393,-0.663306 51.488436,-0.663278 51.488476,-0.663273 51.488498,-0.663273 51.488520,-0.663291 51.488562,-0.663339 51.488640,-0.663387 51.488685,-0.663486 51.488733,-0.663589 51.488750,-0.663703 51.488742,-0.663762 51.488726,-0.663893 51.488593)))
point: POINT (-0.663098 51.488991)
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.