somehow i am getting following error, if i start radius

Error: Errors reading dictionary: dict_init: /etc/freeradius/dictionary.opensips[93]: dict_addattr: Duplicate attribute name Event-Timestamp

If i remove it from /etc/freeradius/dictionary.opensips file it works! but my it screwed my time in mysql table

ATTRIBUTE Event-Timestamp 230 string

Just run grep to find out but it is not anywhere define but still i am getting error

root@sip:/etc/freeradius# grep "Event-Timestamp" * -r
dictionary.opensips:ATTRIBUTE       Event-Timestamp        230     string
sql.conf:                UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \
sql.conf:                UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \
sql.conf:                UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \
sql.conf:                FROM_UNIXTIME(%{Event-Timestamp}), \
sql.conf:                FROM_UNIXTIME(%{Event-Timestamp}), \
sql.conf:                UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \
sql.conf:                UNIX_TIMESTAMP('%S') - '%{Event-Timestamp}', \