Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: TPO248.A1
name: Harthill Road and Allerton Road including Beechley Cottage, Allerton Vicarage, Harthill Lodge, Calder Kids adventure playground and the Model Railway site.
tree-preservation-order: undefined
TPO248
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((-2.901632 53.381415,-2.902734 53.380702,-2.902761 53.380681,-2.902758 53.380669,-2.900972 53.379842,-2.900015 53.379388,-2.899982 53.379386,-2.899885 53.379437,-2.899583 53.379682,-2.898981 53.380124,-2.898702 53.380354,-2.900297 53.381116,-2.899995 53.381202,-2.899763 53.381371,-2.900511 53.381735,-2.900198 53.381943,-2.900192 53.382340,-2.900298 53.382342,-2.900348 53.382320,-2.900391 53.382312,-2.900492 53.382188,-2.900589 53.382095,-2.901632 53.381415)))
point: POINT (-2.900675 53.380678)
notes: The several tree of whatever species situated within area A1 on map.
organisation
entry-date: 1991-11-01
start-date: 1992-01-06
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.