Tree preservation zone

There is a problem

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

reference: 90/00487/C
name: High Street, Luddenden
tree-preservation-order: undefined
90/00487/C
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.939493 53.731298,-1.939473 53.731282,-1.939380 53.731262,-1.939393 53.731240,-1.939517 53.731266,-1.939562 53.731199,-1.939588 53.731151,-1.939701 53.730955,-1.939705 53.730847,-1.939709 53.730793,-1.939717 53.730554,-1.939724 53.730436,-1.939724 53.730405,-1.939135 53.730304,-1.939059 53.730342,-1.939051 53.730451,-1.939056 53.730496,-1.938954 53.730494,-1.938969 53.730507,-1.939005 53.730584,-1.939010 53.730681,-1.938983 53.730703,-1.938954 53.730716,-1.938888 53.730722,-1.938898 53.730768,-1.938932 53.730954,-1.938934 53.730994,-1.938951 53.731085,-1.938956 53.731123,-1.938959 53.731168,-1.938959 53.731357,-1.938962 53.731431,-1.938956 53.731521,-1.938947 53.731558,-1.938937 53.731590,-1.939019 53.731596,-1.939313 53.731624,-1.939313 53.731612,-1.939329 53.731546,-1.939335 53.731535,-1.939493 53.731298)))
point: POINT (-1.939292 53.730918)
notes: Mountain ash, beech, holly, silver birch, norway spruce, cedar, oak, sycamore, cherry, willow, scots pine, ash, horse chesnut, hawthorn
entry-date: 1991-01-24
start-date: 1991-01-24
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.