CREATE TABLE table_20211 ("#" FLOAT, "Season" FLOAT, "Bowl game" TEXT, "Result" TEXT, "Opponent" TEXT, "Stadium" TEXT, "Location" TEXT, "Attendance" TEXT)

What is the highest season for a bowl game of the 1993 Independence Bowl?
SELECT MAX("Season") FROM table_20211 WHERE "Bowl game" = '1993 Independence Bowl'
SELECT MAX("Season") FROM "table_20211" WHERE "Bowl game" = '1993 Independence Bowl'