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: ZZZZDTESXE969
name: The Chiltern District Council (Land Between Tryfan, Lower Road and 4 Russett Hill, Chalfont St Peter
tree-preservation-order: undefined
TPO/1995/007
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.551120 51.595791,-0.551139 51.595790,-0.551162 51.595783,-0.551174 51.595775,-0.551181 51.595768,-0.551186 51.595760,-0.551189 51.595750,-0.551189 51.595744,-0.551184 51.595731,-0.551176 51.595721,-0.551161 51.595711,-0.551150 51.595707,-0.551129 51.595703,-0.551112 51.595703,-0.551088 51.595708,-0.551074 51.595715,-0.551063 51.595723,-0.551053 51.595740,-0.551041 51.595741,-0.551026 51.595745,-0.551010 51.595753,-0.550997 51.595766,-0.550992 51.595781,-0.550993 51.595789,-0.550999 51.595801,-0.551011 51.595811,-0.551024 51.595818,-0.551046 51.595823,-0.551070 51.595823,-0.551096 51.595815,-0.551110 51.595806,-0.551116 51.595799,-0.551120 51.595791)))
point: POINT (-0.551091 51.595763)
notes
entry-date: 2010-02-18
start-date: 2010-02-18
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.