This error indicates that the values entered in the "Logistic-class" attribute are not recognized by Carrefour.
Once you have configured the logistic categories in your Mirakl account, you can enter the corresponding codes for these categories in Lengow. Here is the list of valid values:
Code = Definition
XXS = Very Light Products
XS = Standard Products
S = Special Standard Products
M = Medium Weight Products
L = Heavy and Long Products
XL = Very Heavy and Very Long Products
XXL = Outsize Products
You should use the codes rather than their definitions. For example, to indicate "Special Standard Products", you can enter the code "S" in the "Logistic-class" attribute.