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_51057 ( "Year" real, "Beer Name" text, "Prize" text, "Category" text, "Competition" text )

### Question ###
What year did maggs magnificent mild bear win overall at the camra reading branch beer festival?

### Accurate SQL ###

SELECT MAX("Year") FROM table_51057 WHERE "Beer Name" = 'maggs magnificent mild' AND "Competition" = 'camra reading branch beer festival' AND "Category" = 'overall'