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_17593 ( "Season" text, "Serbian League Belgrade" text, "Serbian League East" text, "Serbian League Vojvodina" text, "Serbian League West" text )

### Question ###
What team was promoted in the Serbian League East in the same season when Kolubara was promoted in the Serbian League Belgrade?

### Accurate SQL ###

SELECT "Serbian League East" FROM table_17593 WHERE "Serbian League Belgrade" = 'Kolubara'