Transportable tablespace issue with ASM

Hello,
  I am transporting a tablespace with around 50 datafiles. Its a cross-platform transportable tablespace with different endianness, hence am doing a conversion of the datafiles on target system. The issue is that when I issue the RMAN CONVERT command, it refuses to convert one datafile, stating that the alias name already exists. Isn't ASM suppose to create ALIASES on random? Below is what is happening:

RMAN> convert datafile
2> '/accu/data1/sf_agg_zone_01.dbf'
3> from platform 'Solaris[tm] OE (64-bit)'
4> DB_FILE_NAME_CONVERT
5> '/accu/data1','+DG_DATA/AVPROD/DATAFILE'
6> ;

ORA-17502: ksfdcre:4 Failed to create file +DG_DATA/avprod/datafile/sf_agg_zone_01.dbf
ORA-15005: name "avprod/datafile/sf_agg_zone_01.dbf" is already used by an existing alias

WIthin ASM instance, I checked v$asm_alias and found 2 datafiles that I had imported a few steps ago (I am converting datafiles in batches). The datafile name is different than the other 2 datafiles with similar (not matching) names and ASM created aliases for those previous 2 datafiles, but it refuses to create an alias for this datafile (sf_agg_zone_01.dbf).

SQL> select NAME from v$asm_alias where name like '%sf_agg_zone%';

NAME
----------------------------------------------------------------------
sf_agg_zone_1004.dbf
sf_agg_zone_1005.dbf

SQL> select NAME from v$asm_alias where name like '%SF_AGG_ZONE%';

NAME
----------------------------------------------------------------------
SF_AGG_ZONE.297.743647979
SF_AGG_ZONE.298.743647985

All the help is highly appreciated.
Thanks.
WaqasulhaqAsked:
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pinkurayCommented:
A similar solution was found in internet, check this URL "http://www.dba-village.com/village/dvp_forum.OpenThread?ThreadIdA=30931", which will help you to solve your problem.
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WaqasulhaqAuthor Commented:
Found helpful tips in the link
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