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: ZZZZZRESRW911
name: Bucks County Council (Eton R.D.) Tree Preservation Order No. 12; 1950; dated 23/8/50; made under S.2
tree-preservation-order: undefined
TPO/BCC/1950/12
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.605640 51.564703,-0.606083 51.564687,-0.606358 51.564674,-0.606592 51.564671,-0.606621 51.564669,-0.606807 51.564641,-0.606872 51.564639,-0.607037 51.564643,-0.607132 51.564647,-0.607251 51.564655,-0.607311 51.564657,-0.607495 51.564671,-0.607580 51.564678,-0.607649 51.564691,-0.607778 51.564710,-0.607735 51.564680,-0.607723 51.564668,-0.607711 51.564648,-0.607704 51.564628,-0.607702 51.564612,-0.607702 51.564592,-0.607707 51.564561,-0.607721 51.564527,-0.607764 51.564464,-0.607384 51.564474,-0.607124 51.564488,-0.606998 51.564499,-0.606846 51.564508,-0.606690 51.564512,-0.606454 51.564514,-0.606302 51.564510,-0.606181 51.564498,-0.606094 51.564485,-0.606039 51.564469,-0.605934 51.564435,-0.605875 51.564412,-0.605858 51.564402,-0.605820 51.564368,-0.605678 51.564230,-0.605668 51.564216,-0.605658 51.564198,-0.605639 51.564142,-0.605522 51.564166,-0.605519 51.564198,-0.605496 51.564188,-0.605488 51.564248,-0.605486 51.564282,-0.605495 51.564393,-0.605516 51.564504,-0.605516 51.564510,-0.605546 51.564514,-0.605554 51.564566,-0.605573 51.564593,-0.605640 51.564703)))
point: POINT (-0.606435 51.564536)
notes
entry-date: 2019-05-02
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.