Tree preservation zone

There is a problem

453 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: 89/00464/C
name: Shaw Hill Lane/Sedburgh Road, Halifax
tree-preservation-order: undefined
89/00464/C
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.856031 53.715452,-1.856069 53.715453,-1.856108 53.715478,-1.856303 53.715491,-1.856295 53.715476,-1.856314 53.714972,-1.855759 53.714823,-1.855686 53.714949,-1.856193 53.715068,-1.856132 53.715161,-1.856062 53.715218,-1.856194 53.715215,-1.856198 53.715324,-1.855976 53.715306,-1.855805 53.715274,-1.855713 53.715253,-1.855441 53.715168,-1.855502 53.715073,-1.855553 53.714967,-1.855501 53.714958,-1.855447 53.715075,-1.855386 53.715129,-1.855371 53.715504,-1.855481 53.715500,-1.855477 53.715465,-1.855416 53.715429,-1.855414 53.715300,-1.855981 53.715325,-1.855981 53.715364,-1.856026 53.715365,-1.856031 53.715452)))
point: POINT (-1.855931 53.71517)
notes: Sycamore, ash, holly, lime, silver birch, willow
entry-date: 1990-05-11
start-date: 1990-05-11
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.