The DimensionAttributeValue RecId[%1 is referenced by different DimensionAttributeLevelValue and DimensionAttributeValueSetItem ...

The [DimensionAttributeValue] RecId[%1] is referenced by different [DimensionAttributeLevelValue] and [DimensionAttributeValueSetItem] display values, respectively pointing to different Retail Channels.
Execute query "SELECT * FROM DIMENSIONATTRIBUTELEVELVALUE DALV WHERE DALV.DIMENSIONATTRIBUTEVALUE = %1" to check for different display values.
Execute query "SELECT * FROM DIMENSIONATTRIBUTEVALUESETITEM DALV WHERE DALV.DIMENSIONATTRIBUTEVALUE = %1" to check for different display values.
UPDATE DimensionAttributeValue SET ENTITYINSTANCE =  WHERE RECID = %1