Sayeth the manual:
If you decide that you can skip the next statement from the master, issue the following statements:
mysql> SET GLOBAL SQL_SLAVE_SKIP_COUNTER = N;
mysql> START SLAVE;
The value of N should be 1 if the next statement from the master does not use AUTO_INCREMENT or LAST_INSERT_ID(). Otherwise, the value should be 2. The reason for using a value of 2 for statements that use AUTO_INCREMENT or LAST_INSERT_ID() is that they take two events in the binary log of the master.
See also Section 126.96.36.199, “SET GLOBAL SQL_SLAVE_SKIP_COUNTER Syntax”.