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: TPO342
name: 4/1983
tree-preservation-order: undefined
4/1983
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((0.623018 51.270925,0.623159 51.270954,0.623420 51.270990,0.623459 51.271007,0.623466 51.271017,0.623461 51.271031,0.623303 51.271044,0.623018 51.271049,0.622567 51.271042,0.622185 51.271016,0.621940 51.271009,0.621619 51.271021,0.621448 51.271010,0.621326 51.271029,0.621196 51.271036,0.621186 51.271021,0.621194 51.270984,0.621209 51.270961,0.621314 51.270916,0.622012 51.270854,0.622250 51.270897,0.622469 51.270925,0.622903 51.270937,0.623018 51.270925)))
point: POINT (0.622252 51.270969)
notes: Maidstone Borough Council Tree Preservation Order No 4 of 1983 as varied by the Maidstone Borough Council Tree Preservation Order No.16 of 1988 made under Section 60 of the Town and Country Planning Act 1971
organisation
entry-date: 1988-11-05
start-date: 1988-10-14
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.