Tree preservation zone

There is a problem

368 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: IAO7MCDNBB000
name: Land Between Horfield Road And Terrell Street Bristol BS2 8EQ
tree-preservation-order: undefined
541
tree-preservation-zone-type: group
geometry: MULTIPOLYGON (((-2.597981 51.459051,-2.597998 51.458982,-2.598006 51.458932,-2.598005 51.458909,-2.598000 51.458884,-2.597990 51.458857,-2.597971 51.458822,-2.597939 51.458778,-2.597770 51.458588,-2.597746 51.458570,-2.597606 51.458672,-2.597604 51.458674,-2.597604 51.458678,-2.597609 51.458684,-2.597632 51.458703,-2.597667 51.458722,-2.597743 51.458783,-2.597759 51.458804,-2.597774 51.458831,-2.597788 51.458863,-2.597792 51.458876,-2.597795 51.458902,-2.597794 51.458949,-2.597760 51.459171,-2.597760 51.459191,-2.597774 51.459215,-2.597779 51.459218,-2.597801 51.459196,-2.597841 51.459206,-2.597863 51.459207,-2.597898 51.459199,-2.597919 51.459189,-2.597928 51.459181,-2.597956 51.459131,-2.597969 51.459096,-2.597981 51.459051)))
point: POINT (-2.597843 51.458897)
notes: SILVER BIRCH - Betula pendula,PINE - Pinus spp, COMMON LIME - Tilia x europaea, OAK - Quercus robur
entry-date: 2005-01-21
start-date: 2005-01-21
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.