Table 'monthly_report_sale' already exists

create table otomotif_omc.monthly_report_sale ( yyyy_mm char (8) not null, seq_no char(8) not null, amount double unsigned not null, quantity double unsigned not null, sales_date date not null, last_update_by varchar(10) not null, last_update_date datetime not null, last_ip_address char(15) not null )Duplicate key name 'index_1'
Duplicate key name 'index_1'