Error:
Invalid article GTIN.
Explanation:
The EAN article code of an article is assigned by the supplier.
It must be a valid GTIN: a worldwide unique coding of articles.
The last number of the code is a verification number, against which the validity is checked.
If this check number is incorrect, this code will appear.
Solution:
Check the incorrect GTINs for validity and correct them. If necessary, ask the producer/supplier for the code.
