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: ZZZZZWESRW258
name: South Bucks District Council (No. 45) Tree Preservation Order 1995; dated 20/9/95; made under Sectio
tree-preservation-order: undefined
TPO/SBDC/1995/45
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.499902 51.568404,-0.499909 51.568387,-0.499912 51.568367,-0.499905 51.568349,-0.499913 51.568335,-0.499908 51.568313,-0.499888 51.568302,-0.499871 51.568297,-0.499823 51.568274,-0.499786 51.568270,-0.499735 51.568274,-0.499695 51.568281,-0.499641 51.568286,-0.499617 51.568305,-0.499604 51.568322,-0.499598 51.568343,-0.499600 51.568388,-0.499607 51.568412,-0.499609 51.568429,-0.499636 51.568498,-0.499651 51.568518,-0.499679 51.568534,-0.499702 51.568546,-0.499731 51.568552,-0.499770 51.568551,-0.499795 51.568536,-0.499829 51.568523,-0.499848 51.568496,-0.499863 51.568465,-0.499902 51.568404)))
point: POINT (-0.49975 51.5684)
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.