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_50905 ( "Acharya Number" real, "Name of Acharya" text, "Born on" text, "Became Acharya on" text, "Death" text, "Term" text )

### Question ###
When did acharya shree koshalendraprasadji maharaj become acharya?

### Accurate SQL ###

SELECT "Became Acharya on" FROM table_50905 WHERE "Name of Acharya" = 'acharya shree koshalendraprasadji maharaj'