Tree preservation zone

There is a problem

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

reference: 93/00793/C
name: Brackenbed Farm, Brackenbed Lane, Halifax
tree-preservation-order: undefined
93/00793/C
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.885786 53.731773,-1.885827 53.731782,-1.885842 53.731781,-1.885859 53.731772,-1.885880 53.731742,-1.885868 53.731718,-1.885818 53.731685,-1.885682 53.731589,-1.885407 53.731419,-1.885333 53.731375,-1.885277 53.731353,-1.885217 53.731352,-1.885188 53.731365,-1.885176 53.731383,-1.885183 53.731412,-1.885431 53.731555,-1.885456 53.731568,-1.885521 53.731610,-1.885786 53.731773)),((-1.885872 53.731597,-1.885872 53.731600,-1.885875 53.731603,-1.885884 53.731606,-1.885894 53.731605,-1.885900 53.731602,-1.885902 53.731599,-1.885902 53.731595,-1.885897 53.731590,-1.885889 53.731588,-1.885879 53.731589,-1.885875 53.731591,-1.885872 53.731594,-1.885872 53.731597)))
point: POINT (-1.885529 53.731557)
notes: Ash, hawthorn, lime, sycamore
entry-date: 1994-01-07
start-date: 1994-01-07
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.