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_21684 ( "School" text, "Years of Participation" text, "OCC Championships" real, "Last OCC Championship" text, "Last Outright OCC Championship" text )

### Question ###
What is the fewest number of occ championships for the team that last won an outright occ championship in 2006?

### Accurate SQL ###

SELECT MIN("OCC Championships") FROM table_21684 WHERE "Last Outright OCC Championship" = '2006'