Relation, authorisation and sequence errorsRelation & missing element

CDS12079Relation Error: Data Element 2 must not be supplied with Data Element 1

HMRC explanation

Relation error - Two values you declared are incompatible. For example: A data element is declared at both header and item levels but only one level is permissible; You have entered a MUCR in DE 2/1 for a GVMS location code in DE 5/23.

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