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: ZZZZDVESXE570
name: Amersham Rural District Council (Hill Farm, Chalfont St Peter) Tree Preservation Order, 1966 Confirm
tree-preservation-order: undefined
TPO/1966/034
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.551620 51.611224,-0.551618 51.611205,-0.551636 51.611177,-0.551610 51.611160,-0.551589 51.611104,-0.551632 51.611089,-0.551594 51.611071,-0.551608 51.611047,-0.551570 51.611014,-0.551572 51.610972,-0.551558 51.610938,-0.551567 51.610913,-0.551543 51.610892,-0.551550 51.610876,-0.551521 51.610853,-0.551498 51.610807,-0.551500 51.610774,-0.551487 51.610764,-0.551478 51.610742,-0.551485 51.610720,-0.551476 51.610713,-0.551484 51.610708,-0.551485 51.610686,-0.551455 51.610667,-0.551465 51.610653,-0.551457 51.610617,-0.551436 51.610595,-0.551367 51.610586,-0.551358 51.610598,-0.551359 51.610627,-0.551369 51.610647,-0.551373 51.610685,-0.551390 51.610709,-0.551383 51.610723,-0.551394 51.610733,-0.551416 51.610796,-0.551454 51.610856,-0.551479 51.610957,-0.551502 51.611014,-0.551527 51.611177,-0.551546 51.611205,-0.551573 51.611226,-0.551609 51.611233,-0.551620 51.611224)))
point: POINT (-0.551498 51.610903)
notes
organisation
entry-date: 2010-02-18
start-date: 2010-02-18
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.