FeedFixer

Amazon error 13013: The SKU is not in the catalogue

What does it mean?

You sent a price, stock or image update for a SKU whose creation failed or that was deleted.

How to fix it

Solve the error that blocked the creation first; after a delete, wait 24 hours.

Where do you fix it?

More on this subject

Source

Summarised in our own words; Amazon's page is leading.