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: ZZZZZWESRW373
name: South Bucks District Council (No. 7) Tree Preservation Order; 1985; dated 18/10/85 made under Ss. 60
tree-preservation-order: undefined
TPO/SBDC/1985/07
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.638998 51.550257,-0.639011 51.550219,-0.639014 51.550199,-0.639012 51.550178,-0.639005 51.550158,-0.638992 51.550139,-0.638973 51.550122,-0.638951 51.550107,-0.638925 51.550094,-0.638895 51.550085,-0.638864 51.550078,-0.638798 51.550076,-0.638765 51.550080,-0.638735 51.550088,-0.638706 51.550099,-0.638681 51.550112,-0.638660 51.550128,-0.638644 51.550146,-0.638633 51.550166,-0.638628 51.550186,-0.638585 51.550248,-0.638552 51.550311,-0.638528 51.550377,-0.638524 51.550395,-0.638525 51.550413,-0.638530 51.550431,-0.638540 51.550449,-0.638555 51.550465,-0.638573 51.550479,-0.638595 51.550491,-0.638620 51.550501,-0.638647 51.550508,-0.638676 51.550513,-0.638705 51.550514,-0.638735 51.550512,-0.638763 51.550508,-0.638790 51.550500,-0.638815 51.550490,-0.638836 51.550478,-0.638998 51.550257)))
point: POINT (-0.638765 51.550292)
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.