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: ZZZZZTESRW859
name: South Bucks District Council Tree Preservation Order No. 20; 2003; dated 22/7/2003. Confirmed 17/9/2
tree-preservation-order: undefined
TPO/SBDC/2003/20
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.593258 51.530976,-0.593260 51.530968,-0.593260 51.530958,-0.593255 51.530938,-0.593244 51.530923,-0.593210 51.530897,-0.593181 51.530882,-0.593160 51.530874,-0.593106 51.530862,-0.593073 51.530858,-0.593014 51.530857,-0.592988 51.530860,-0.592949 51.530869,-0.592934 51.530874,-0.592904 51.530888,-0.592890 51.530897,-0.592875 51.530915,-0.592871 51.530923,-0.592865 51.530943,-0.592867 51.530955,-0.592878 51.530975,-0.592884 51.530983,-0.592908 51.531004,-0.592935 51.531019,-0.592974 51.531034,-0.593009 51.531043,-0.593055 51.531049,-0.593114 51.531049,-0.593162 51.531042,-0.593177 51.531038,-0.593202 51.531029,-0.593225 51.531017,-0.593236 51.531009,-0.593251 51.530994,-0.593256 51.530985,-0.593258 51.530976)))
point: POINT (-0.593064 51.530953)
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.