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: ZZZZZWESRW314
name: South Bucks District Council (No. 7) Tree Preservation Order 1993; dated 21/4/93; made under Section
tree-preservation-order: undefined
TPO/SBDC/1993/07
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.592649 51.561694,-0.592704 51.561716,-0.592735 51.561721,-0.592766 51.561718,-0.592781 51.561715,-0.592794 51.561710,-0.592816 51.561695,-0.592823 51.561687,-0.592828 51.561677,-0.592831 51.561668,-0.592830 51.561658,-0.592827 51.561648,-0.592822 51.561639,-0.592803 51.561623,-0.592720 51.561596,-0.592707 51.561593,-0.592678 51.561590,-0.592649 51.561594,-0.592636 51.561598,-0.592614 51.561610,-0.592600 51.561626,-0.592596 51.561635,-0.592595 51.561644,-0.592596 51.561653,-0.592600 51.561662,-0.592614 51.561678,-0.592624 51.561685,-0.592649 51.561694)))
point: POINT (-0.592713 51.561655)
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.