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: ZZZZZSESRW600
name: Bucks County Council (Eton Rural District) Tree Preservation Order No. 3; 1950; dated 12/1/50 under
tree-preservation-order: undefined
TPO/BCC/1950/03
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.570057 51.561487,-0.570001 51.561491,-0.569978 51.561529,-0.569981 51.561571,-0.569999 51.561609,-0.570029 51.561646,-0.570093 51.561704,-0.570124 51.561756,-0.570144 51.561770,-0.570266 51.561769,-0.570326 51.561785,-0.570341 51.561803,-0.570350 51.561835,-0.570327 51.561884,-0.570403 51.561922,-0.570443 51.561972,-0.570466 51.562024,-0.570540 51.562074,-0.570715 51.562124,-0.570877 51.562149,-0.571184 51.562254,-0.571329 51.562289,-0.571725 51.562364,-0.572059 51.562416,-0.572190 51.562427,-0.572202 51.562344,-0.572188 51.562255,-0.572150 51.562145,-0.572084 51.562029,-0.572034 51.561965,-0.571973 51.561917,-0.571860 51.561843,-0.571705 51.561767,-0.571533 51.561701,-0.571386 51.561656,-0.571257 51.561625,-0.571039 51.561591,-0.570876 51.561556,-0.570057 51.561487)))
point: POINT (-0.571166 51.561932)
notes
organisation
entry-date: 2017-07-04
start-date: 2017-07-04
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.