HeaderIndex-column filled for feature but not all...

Error:

HeaderIndex' column has been filled for one or more features, but not all.

Explanation:

By means of the HeaderIndex1..X you can determine the order of the features (Header1..X). To do this correctly, either each feature must be assigned an index, or none must be assigned an index. If no index is assigned, the order of delivery is used for new articles. For pre-existing articles, the order of the features remains unchanged.

Solution:

Make sure that all the features of an article (group) have been assigned an index.

Or ensure that none of the features of an article or group of articles has been assigned an index.