-24956: ERR_BASAVETYPECON - backup type conflicts with medium definition 

Explanation:

An attempt has been made to Save or Restore using the defined medium. However, the predefined save type for the medium ( LOG , DATA or PAGES ) and the save type used for the Save or Restore clash.

User Action:

Correct your entry or the medium definition.

You may sometimes have to readjust your definition again to restore older backups.