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: TPO718
name: 16/1976
tree-preservation-order: undefined
16/1976
tree-preservation-zone-type: area
geometry: MULTIPOLYGON (((0.591741 51.294800,0.591703 51.294765,0.591762 51.294729,0.591835 51.294730,0.591934 51.294748,0.592044 51.294774,0.592093 51.294795,0.592217 51.294874,0.592290 51.294905,0.592482 51.294956,0.592782 51.295011,0.592923 51.295066,0.593054 51.295153,0.593206 51.295307,0.593425 51.295500,0.593614 51.295724,0.593699 51.295836,0.593822 51.296020,0.593688 51.296054,0.593456 51.295770,0.593225 51.295514,0.593004 51.295328,0.592801 51.295195,0.592694 51.295154,0.592574 51.295127,0.592160 51.295047,0.592095 51.295024,0.591941 51.295009,0.591741 51.294800)))
point: POINT (0.592789 51.295246)
notes: Maidstone Borough Council Tree Preservation Order No. 16 of 1976 under Section 60 of the Town and Country Planning Act 1971. Area of Trees - A2 comprising Ash (Fraxinus excelsior),
organisation
entry-date: 1976-07-12
start-date: 1976-07-02
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.