duplicated query insert doing accounting

[Leandro]

Hi guys , Im trying to tune my accounting server.
Everything is working good so far.
On strange thing is the following line when debuging.

rlm_sql_mysql: MYSQL check_error: 1062 received
rlm_sql (sql): Duplicate entry '915bec9642b89feb789b9566b7ec6e9b' for 
key 'acctuniqueid'
rlm_sql_mysql: MYSQL check_error: 1062 received
rlm_sql_mysql: Cannot store result
rlm_sql_mysql: MySQL error 'Duplicate entry 
'915bec9642b89feb789b9566b7ec6e9b' for key 'acctuniqueid''

Why is there a second attempt to insert a register ?

On the client side I did:
radclient -f accounting_packet 172.20.4.208 acct xxxxxxx
and checked that there is only one accounting request going to the server.

Regards,
Leandro