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: ZZZZZXESRW213
name: South Bucks District Council (No. 7) Tree Preservation Order 1995; dated 12/4/95; made under Section
tree-preservation-order: undefined
TPO/SBDC/1995/07
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.566911 51.575640,-0.566937 51.575642,-0.566988 51.575636,-0.567011 51.575629,-0.567033 51.575620,-0.567052 51.575609,-0.567067 51.575596,-0.567079 51.575581,-0.567086 51.575566,-0.567089 51.575550,-0.567088 51.575533,-0.567082 51.575517,-0.567055 51.575503,-0.567025 51.575492,-0.566992 51.575484,-0.566957 51.575479,-0.566922 51.575479,-0.566887 51.575482,-0.566814 51.575493,-0.566796 51.575499,-0.566765 51.575514,-0.566753 51.575524,-0.566737 51.575546,-0.566733 51.575559,-0.566738 51.575570,-0.566745 51.575582,-0.566755 51.575592,-0.566768 51.575601,-0.566783 51.575609,-0.566800 51.575615,-0.566911 51.575640)))
point: POINT (-0.566917 51.575558)
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.