Manufacturer GTIN not unique, already used at article...
Error:
Manufacturer GTIN {0} is not unique; it is first used (in this file) at article {1}.
Explanation:
Each item from a manufacturer shall have a unique GTIN. The manufacturer GTIN associated with an article is not unique. It is the first to be used with the named item in the import file.
Solution:
Find the duplicate manufacturer GTINs in the import file and correct the incorrect code so that there are no more duplicate codes in the import file.
