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: ZZZZDVESXE734
name: The Bucks County Council (Amersham Rural District) Tree Preservation Order No 8 - 1949 Confirmed by
tree-preservation-order: undefined
TPO/1949/008
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.563788 51.649183,-0.563689 51.649210,-0.563640 51.649208,-0.563558 51.649175,-0.563536 51.649153,-0.563518 51.649122,-0.563379 51.648831,-0.563211 51.648458,-0.563040 51.648073,-0.562962 51.648087,-0.562912 51.648089,-0.562948 51.648177,-0.563059 51.648435,-0.563229 51.648855,-0.563443 51.649370,-0.563477 51.649444,-0.563495 51.649490,-0.564009 51.649324,-0.564279 51.649230,-0.564400 51.649191,-0.564558 51.649108,-0.564737 51.649003,-0.564899 51.648902,-0.565025 51.648819,-0.565231 51.648667,-0.565515 51.648442,-0.565725 51.648310,-0.565933 51.648152,-0.565964 51.648119,-0.566157 51.647871,-0.566269 51.647710,-0.566008 51.647646,-0.565903 51.647798,-0.565824 51.647891,-0.565756 51.647967,-0.565551 51.648174,-0.565356 51.648374,-0.564815 51.648755,-0.564690 51.648817,-0.564548 51.648885,-0.564516 51.648876,-0.564474 51.648909,-0.564100 51.649069,-0.563788 51.649183)))
point: POINT (-0.564554 51.648677)
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.