Duplicate entry in MySQL slave

I have a MySQL master-slave replication setup. When I checked show slave status, I got the result as Slave_Sql_running:No and last error as Duplicate entry 'x' on query.

But when I tried to delete the entry from that table result shown as 0 rows affected.

I tried to fetch the record using select statement. Even then the result shown as 0 rows affected.

Then I checked slave status again. The same state persists and the same error appears.