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_24394 ( "State (class)" text, "Vacator" text, "Reason for change" text, "Successor" text, "Date of successors formal installation" text )

### Question ###
What change caused a change of staff in March 9, 1865?

### Accurate SQL ###

SELECT "Reason for change" FROM table_24394 WHERE "Date of successors formal installation" = 'March 9, 1865'