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: 01/01168/C/1
name: Land between Park View and The Willows, green Lane, Shelf.
tree-preservation-order: undefined
01/01168/C
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-1.807517 53.752714,-1.807501 53.752700,-1.806838 53.752789,-1.806838 53.752800,-1.806897 53.752802,-1.807034 53.752785,-1.807517 53.752714)),((-1.805897 53.752868,-1.806441 53.753539,-1.806464 53.753528,-1.806583 53.753508,-1.806529 53.753408,-1.806448 53.753205,-1.806579 53.753165,-1.806341 53.752874,-1.806338 53.752852,-1.805897 53.752868)),((-1.807697 53.752880,-1.807710 53.752889,-1.807728 53.752880,-1.807718 53.752871,-1.807697 53.752880)),((-1.807712 53.752907,-1.807725 53.752916,-1.807743 53.752907,-1.807733 53.752898,-1.807712 53.752907)),((-1.807757 53.752961,-1.807775 53.752970,-1.807788 53.752959,-1.807768 53.752952,-1.807757 53.752961)),((-1.807622 53.752781,-1.807640 53.752790,-1.807652 53.752779,-1.807632 53.752772,-1.807622 53.752781)),((-1.807788 53.752988,-1.807805 53.752997,-1.807818 53.752986,-1.807798 53.752979,-1.807788 53.752988)),((-1.807592 53.752745,-1.807609 53.752754,-1.807622 53.752743,-1.807602 53.752736,-1.807592 53.752745)),((-1.807803 53.753024,-1.807821 53.753033,-1.807833 53.753022,-1.807813 53.753015,-1.807803 53.753024)))
point: POINT (-1.806354 53.753107)
notes: Hawthorn
entry-date: 2001-08-29
start-date: 2001-08-29
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.