CREATE TABLE table_203_391 (id DECIMAL, "season" TEXT, "greek league" TEXT, "greek cup" TEXT, "europe" TEXT, "coach" TEXT, "roster" TEXT)

when was the last appearance in the greek league ?
SELECT MAX("season") FROM table_203_391 WHERE NOT "greek league" IS NULL
SELECT MAX("season") FROM "table_203_391" WHERE NOT "greek league" IS NULL