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: 91/00635/C
name: Land adjacent to Brow Bridge Mill, Rochdale Road, Greetland
tree-preservation-order: undefined
91/00635/C
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((-1.857155 53.688107,-1.857126 53.688078,-1.857115 53.688076,-1.857018 53.687970,-1.856898 53.688010,-1.856797 53.688034,-1.856779 53.688051,-1.856731 53.688057,-1.856846 53.688065,-1.856849 53.688076,-1.856922 53.688072,-1.856977 53.688086,-1.857056 53.688138,-1.857067 53.688162,-1.857066 53.688186,-1.857057 53.688204,-1.856915 53.688307,-1.856608 53.688467,-1.856503 53.688535,-1.856422 53.688605,-1.856357 53.688680,-1.856336 53.688732,-1.856334 53.688796,-1.856354 53.688787,-1.856743 53.688748,-1.856942 53.688635,-1.857626 53.688298,-1.857814 53.688194,-1.858283 53.687828,-1.858597 53.687542,-1.858628 53.687455,-1.858629 53.687356,-1.858656 53.687269,-1.858843 53.686997,-1.858815 53.686997,-1.858767 53.687018,-1.858551 53.687301,-1.858291 53.687543,-1.858182 53.687620,-1.857837 53.687817,-1.857794 53.687855,-1.857644 53.687929,-1.857390 53.688028,-1.857155 53.688107)))
point: POINT (-1.857499 53.688119)
notes: Oak, Willow, Sycamore, Ash, Hawthorn
entry-date: 1991-12-04
start-date: 1991-12-04
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.