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: ZZZZZXESRW178
name: South Bucks District Council (No. 31) Tree Preservation Order 1995; dated 31/5/95; made under Sectio
tree-preservation-order: undefined
TPO/SBDC/1995/31
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.565129 51.578006,-0.565215 51.577931,-0.565211 51.577929,-0.565487 51.577672,-0.565571 51.577595,-0.565611 51.577561,-0.565481 51.577539,-0.565624 51.577373,-0.565451 51.577339,-0.564891 51.577236,-0.564461 51.577155,-0.563810 51.577812,-0.563804 51.577787,-0.563543 51.578053,-0.563395 51.578201,-0.563376 51.578221,-0.563364 51.578240,-0.563360 51.578258,-0.563362 51.578279,-0.563367 51.578291,-0.563378 51.578309,-0.563390 51.578323,-0.563415 51.578343,-0.563441 51.578357,-0.563986 51.578554,-0.564300 51.578223,-0.564392 51.578009,-0.564951 51.578086,-0.564952 51.578059,-0.565055 51.578072,-0.565129 51.578006)))
point: POINT (-0.564484 51.577796)
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.