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: ZZZZZTESRW123
name: South Bucks District Council (No.13) Tree Preservation Order 1995; dated 12/4/95; made under Section
tree-preservation-order: undefined
TPO/SBDC/1995/13
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.640845 51.608705,-0.640968 51.609091,-0.641045 51.609387,-0.641091 51.609392,-0.641333 51.609377,-0.641489 51.609296,-0.642167 51.609196,-0.642168 51.609190,-0.642666 51.609093,-0.642590 51.608955,-0.643493 51.608750,-0.642601 51.608476,-0.642455 51.608377,-0.642438 51.608358,-0.642438 51.608298,-0.642037 51.608122,-0.641966 51.608062,-0.641835 51.608103,-0.641716 51.608130,-0.641676 51.608126,-0.641614 51.608092,-0.641460 51.607885,-0.641468 51.607849,-0.641335 51.607665,-0.641205 51.607507,-0.641128 51.607363,-0.641133 51.607331,-0.640120 51.607384,-0.639619 51.608513,-0.639644 51.608521,-0.639656 51.608501,-0.640095 51.608646,-0.640426 51.608544,-0.640427 51.608553,-0.640553 51.608517,-0.640562 51.608638,-0.640819 51.608620,-0.640845 51.608705)))
point: POINT (-0.641256 51.608384)
notes
organisation
entry-date: 2020-10-19
start-date: 2020-10-19
end-date

Your dataset is missing the tree-preservation-order column.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.