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: ZZZZZVESRW455
name: South Bucks District Council (No. 8) Tree Preservation Order 1999; dated 9/3/99; made under Sections
tree-preservation-order: undefined
TPO/SBDC/1999/08
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.533141 51.566039,-0.533031 51.565718,-0.532881 51.565333,-0.532771 51.565123,-0.532332 51.564413,-0.530853 51.563886,-0.530516 51.563783,-0.529574 51.563744,-0.529125 51.563701,-0.529122 51.563727,-0.529099 51.563747,-0.529067 51.563804,-0.529023 51.563838,-0.528983 51.563855,-0.528976 51.563937,-0.528830 51.564051,-0.528946 51.564361,-0.529155 51.565055,-0.528947 51.565335,-0.527735 51.566283,-0.527076 51.566530,-0.527070 51.566545,-0.526857 51.566615,-0.526622 51.566754,-0.527985 51.568866,-0.528428 51.568765,-0.528816 51.568606,-0.529073 51.568464,-0.529592 51.568099,-0.529645 51.568068,-0.529865 51.567978,-0.530108 51.567996,-0.532042 51.567291,-0.531932 51.566983,-0.532193 51.566927,-0.532446 51.567129,-0.533529 51.566891,-0.533395 51.566578,-0.533213 51.566274,-0.533141 51.566039)))
point: POINT (-0.53011 51.566226)
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.