Multiple classification chapters found...

Error:

Multiple classification chapters found on level {0} by the name of '{1}.

Explanation:

Each classification layer below the first layer consists of several chapters:

All these chapters have a unique name in order to ensure optimal classification and search function. If several of the same chapters occur in the file, this will result in an error message.

Solution:

Find the duplicate names, determine which name needs to be changed and change it to the correct chapter name.