Tree preservation zone

There is a problem

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

reference: 90/00494/C
name: Land Off Woodhouse Road, Todmorden
tree-preservation-order: undefined
90/00494/C
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-2.077514 53.714765,-2.077524 53.714737,-2.077370 53.714572,-2.077088 53.714319,-2.076734 53.714045,-2.076698 53.714030,-2.076645 53.713985,-2.076594 53.713794,-2.076550 53.713689,-2.076467 53.713577,-2.076467 53.713556,-2.076442 53.713537,-2.076348 53.713430,-2.076284 53.713256,-2.076237 53.713176,-2.076178 53.713037,-2.076112 53.712941,-2.076076 53.712849,-2.076003 53.712797,-2.075890 53.712695,-2.075826 53.712616,-2.075779 53.712526,-2.075751 53.712517,-2.075701 53.712520,-2.075694 53.712610,-2.075661 53.712602,-2.075625 53.712613,-2.075628 53.712668,-2.075646 53.712720,-2.075722 53.712822,-2.075781 53.712876,-2.075983 53.713096,-2.076032 53.713161,-2.076189 53.713412,-2.076219 53.713521,-2.076210 53.713624,-2.076189 53.713700,-2.076018 53.714050,-2.075982 53.714169,-2.075945 53.714340,-2.075940 53.714397,-2.075957 53.714546,-2.075993 53.714637,-2.076013 53.714552,-2.076130 53.714394,-2.076256 53.714290,-2.076322 53.714250,-2.076348 53.714244,-2.076581 53.714345,-2.077072 53.714582,-2.077388 53.714766,-2.077453 53.714783,-2.077514 53.714765)))
point: POINT (-2.076415 53.71387)
notes: Oak, hawthorn, willow, birch, sycamore
entry-date: 1990-05-18
start-date: 1990-05-18
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.