Relation, authorisation and sequence errorsRelation & missing element

CDS12083Relation Error: For Country of Preferential Origin DE 5/16 where mandated, only provide one country or country group, not both

HMRC explanation

Relation error
You have provided both a country and country group for mandatory data element Preferential Origin.
Where the proof of origin document refers to a group of countries, enter the group of countries by using the relevant Union codes in accordance with the codes listed in Appendix 13: Country Codes.
Where data element 5/16 is completed using a preference group code, data element 5/15 must be completed with the specific country of origin for the goods.

Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence

What to check across the Relation, authorisation and sequence errors

Two elements, or a value and a rule, disagree. Read both elements together: completing one element with a particular code often requires another value, and the fault is frequently in the element you did not change. The family also covers parties and authorisations that are not recognised, references that must be unique, and messages sent out of sequence.

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Source: HMRC, Customs Declaration Service error codes, Open Government Licence v3.0. GOV.UK publication · Licence