CREATE TABLE table_31302 ("Season" TEXT, "Ave. Attendance" FLOAT, "+/- ave. on prev. season" TEXT, "Competition" TEXT, "Occupier" TEXT)

What is the lowest value of average attendance when average on previous season is -459?
SELECT MIN("Ave. Attendance") FROM table_31302 WHERE "+/- ave. on prev. season" = '-459'
SELECT MIN("Ave. Attendance") FROM "table_31302" WHERE "+/- ave. on prev. season" = '-459'