in ur musiconhold.conf:

[default]
mode=files
directory=/var/lib/asterisk/moh

[babysue]
mode=files
directory=/var/lib/asterisk/moh/babysue23

[babysue]
mode=files
directory=/var/lib/asterisk/moh/babysue3


will result with:

Class: babysue
        Mode: files
        Directory: /var/lib/asterisk/moh/babysue3
        Use Count: 0
Class: babysue
        Mode: files
        Directory: /var/lib/asterisk/moh/babysue23
        Use Count: 0
Class: default
        Mode: files
        Directory: /var/lib/asterisk/moh
        Use Count: 0

which is having twice the same class name (babysue)