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: ZZZZZXESRW150
name: South Bucks District Council (No. 29) Tree Preservation Order 1995; dated 31/5/95; made under Sectio
tree-preservation-order: undefined
TPO/SBDC/1995/29
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.519755 51.536597,-0.519769 51.536613,-0.519787 51.536623,-0.519809 51.536630,-0.519821 51.536632,-0.519834 51.536632,-0.519858 51.536629,-0.519879 51.536622,-0.519888 51.536616,-0.519897 51.536606,-0.519904 51.536594,-0.519907 51.536582,-0.519907 51.536570,-0.519903 51.536559,-0.519897 51.536547,-0.519887 51.536537,-0.519846 51.536460,-0.519845 51.536454,-0.519852 51.536441,-0.519889 51.536386,-0.519893 51.536378,-0.519894 51.536363,-0.519892 51.536356,-0.519888 51.536349,-0.519881 51.536342,-0.519833 51.536331,-0.519807 51.536330,-0.519781 51.536331,-0.519756 51.536335,-0.519733 51.536341,-0.519711 51.536350,-0.519692 51.536361,-0.519676 51.536374,-0.519664 51.536388,-0.519656 51.536404,-0.519653 51.536420,-0.519654 51.536436,-0.519734 51.536570,-0.519755 51.536597)))
point: POINT (-0.519787 51.536471)
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.