CKM04148W Filter/Analyze Forced due to a Duplicate Backup Record.

Explanation
RECOVER BCS detected one or more duplicate BCS
    records from the backup file, which raises the possibility   
 that other obsolete historical entries or co-dependent     record
types from the BCS backup may be invalid, missing,     or otherwise
inappropriate.  The particular duplicate key     itself may or may
not be of any consequence.  However, the     mere presence of this
anomaly triggers RECOVER to invoke     Filter/Analyze processing.
 The Filter/Analyze phase of     RECOVER will rebuild or discard any
BCS record or component     that is not of sound structural integrity.

Duplicate BCS records are often included
in the BCS Backup     when orphaned C/A's (due to failed C/A Split
activity) have     been picked up by a PHYSICAL backup process.  

User response
None, however specifying either ANALYZE or an
inert     filtering keyword such as INCLUDE-DSN(**) will suppress
this     RC=4 message from being issued.  Specifying NO-ANALYZE is
    generally not recommended and should be used only under the  
  direction of Customer Support.   