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: ZZZZDVESXE762
name: The Urban District of Chesham Interim Preservation Order No 1 Approved by Minister of Town and Count
tree-preservation-order: undefined
TPO/1948/077
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.590304 51.704868,-0.590182 51.704933,-0.590063 51.704906,-0.590003 51.704972,-0.590137 51.705010,-0.590218 51.704999,-0.590758 51.704713,-0.591034 51.704582,-0.591224 51.704498,-0.591328 51.704458,-0.591425 51.704431,-0.591877 51.704356,-0.592649 51.704196,-0.592928 51.704163,-0.593160 51.704147,-0.593379 51.704144,-0.593772 51.704111,-0.593970 51.704082,-0.594228 51.704020,-0.594729 51.703863,-0.595099 51.703701,-0.595356 51.703619,-0.595548 51.703575,-0.595810 51.703535,-0.596089 51.703534,-0.596083 51.703506,-0.595787 51.703471,-0.595715 51.703469,-0.595283 51.703559,-0.594515 51.703824,-0.594229 51.703945,-0.593914 51.704044,-0.593657 51.704076,-0.592811 51.704128,-0.591867 51.704297,-0.591480 51.704375,-0.591336 51.704409,-0.591054 51.704508,-0.590793 51.704612,-0.590304 51.704868)))
point: POINT (-0.593122 51.704142)
notes
organisation
entry-date: 2010-02-18
start-date: 2010-02-18
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.