Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_30 ( draws INTEGER, central_murray VARCHAR, byes VARCHAR )

### Question ###
What is the average number of draws of the central murray of leitchville gunbower, which has less than 0 byes?

### Accurate SQL ###

SELECT AVG(draws) FROM table_name_30 WHERE central_murray = "leitchville gunbower" AND byes < 0