Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: ZZZZZWESRW998
name: South Bucks District Council (No.1) Tree Preservation Order 1984; dated 30/10/84; made under Ss.60 &
tree-preservation-order: undefined
TPO/SBDC/1984/01
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.657067 51.517750,-0.657109 51.517746,-0.657128 51.517741,-0.657146 51.517734,-0.657173 51.517714,-0.657182 51.517702,-0.657188 51.517689,-0.657190 51.517676,-0.657189 51.517663,-0.657184 51.517650,-0.657175 51.517638,-0.657164 51.517627,-0.657132 51.517610,-0.657113 51.517604,-0.657072 51.517599,-0.657051 51.517600,-0.657030 51.517603,-0.656993 51.517616,-0.656978 51.517625,-0.656966 51.517636,-0.656956 51.517648,-0.656951 51.517660,-0.656948 51.517673,-0.656950 51.517687,-0.656955 51.517699,-0.656964 51.517711,-0.656975 51.517722,-0.656990 51.517732,-0.657007 51.517740,-0.657046 51.517749,-0.657067 51.517750)))
point: POINT (-0.657069 51.517675)
notes
entry-date: 2017-07-04
start-date: 2017-07-04
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.