Tree preservation zone

There is a problem

tree-preservation-order column must match the reference field in the tree preservation order dataset

reference: TPO314
name: Fields surrounding village
tree-preservation-order: undefined
Roxby 1951
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-0.602911 53.648613,-0.602911 53.648628,-0.602916 53.648659,-0.602928 53.648690,-0.602946 53.648719,-0.602970 53.648746,-0.602984 53.648759,-0.603000 53.648772,-0.603035 53.648795,-0.603074 53.648815,-0.603117 53.648833,-0.603163 53.648847,-0.603238 53.648861,-0.603263 53.648864,-0.603315 53.648867,-0.603393 53.648864,-0.603444 53.648858,-0.603469 53.648853,-0.603540 53.648834,-0.603604 53.648807,-0.603641 53.648785,-0.603674 53.648761,-0.603701 53.648734,-0.603722 53.648706,-0.603738 53.648676,-0.603747 53.648646,-0.603749 53.648631,-0.603749 53.648615,-0.603746 53.648584,-0.603735 53.648554,-0.603719 53.648524,-0.603696 53.648496,-0.603683 53.648483,-0.603668 53.648470,-0.603635 53.648446,-0.603596 53.648425,-0.603576 53.648416,-0.603532 53.648399,-0.603509 53.648392,-0.603460 53.648381,-0.603409 53.648373,-0.603358 53.648369,-0.603280 53.648370,-0.603228 53.648376,-0.603179 53.648385,-0.603131 53.648398,-0.603109 53.648406,-0.603066 53.648424,-0.603046 53.648434,-0.603010 53.648457,-0.602994 53.648469,-0.602979 53.648481,-0.602953 53.648508,-0.602933 53.648537,-0.602919 53.648567,-0.602912 53.648597,-0.602911 53.648613)))
point: POINT (-0.60333 53.648618)
notes
entry-date: 1951-11-21
start-date: 1951-08-20
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.