6027-1008 Attribute found in custom multiple times: attribute.
Explanation
The attribute specified on the command line is in
a custom section multiple times. This is occasionally legal. These
attributes are not meant to be repaired by mmfixcfg.
User response
Fix the configuration file (mmfs.cfg or mmfscfg1 in
the SDR). All attributes modified by GPFS™ configuration
commands may appear only once in custom sections of the configuration
file.