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: TPO990
name: 7/1990
tree-preservation-order: undefined
7/1990
tree-preservation-zone-type: woodland
geometry: MULTIPOLYGON (((0.665928 51.260519,0.665923 51.260638,0.665906 51.260761,0.665865 51.260828,0.665718 51.261028,0.665556 51.261160,0.665427 51.261248,0.665310 51.261316,0.665031 51.261419,0.664967 51.261436,0.664793 51.261476,0.664560 51.261515,0.664265 51.261522,0.663991 51.261495,0.663859 51.261470,0.663716 51.261422,0.663501 51.261319,0.663187 51.261132,0.662998 51.260952,0.662852 51.260809,0.662633 51.260572,0.662541 51.260469,0.662499 51.260406,0.662439 51.260292,0.662408 51.260197,0.662393 51.260062,0.662398 51.259952,0.662413 51.259894,0.662457 51.259784,0.662550 51.259624,0.662613 51.259545,0.662696 51.259466,0.662813 51.259374,0.663063 51.259230,0.663328 51.259159,0.663546 51.259110,0.663695 51.259089,0.663864 51.259076,0.664049 51.259073,0.664249 51.259085,0.664363 51.259100,0.664536 51.259136,0.664683 51.259189,0.665037 51.259429,0.665192 51.259567,0.665656 51.259991,0.665838 51.260198,0.665910 51.260293,0.665928 51.260519)))
point: POINT (0.664155 51.260297)
notes: The Maidstone Borough Council Tree Preservation Order No 7 of 1990 under Section 60 of the Town and Country Planning Act 1971 Woodlands - W5 mixed Deciduous and Conifer
organisation
entry-date: 1990-10-05
start-date: 1990-10-02
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.