No new article number specified for '{0}'

Error:

No new article number specified for '{0}'.

Explanation:

When renumbering article numbers, a new number must be specified for each old article number.

There are lines in the import file where a new number has been forgotten, or there are still lines in the import file that should not be changed.

Solution:

Find the lines in which no new article number has been entered. Enter a new number or remove the line from the import file.