CREATE TABLE table_46689 ("Res." CLOB, "Record" CLOB, "Opponent" CLOB, "Method" CLOB, "Event" CLOB, "Round" CLOB, "Location" CLOB)

Which event led to a loss against Josh Diekman?
SELECT "Event" FROM table_46689 WHERE "Res." = 'loss' AND "Opponent" = 'josh diekman'
SELECT "Event" FROM "table_46689" WHERE "Opponent" = 'josh diekman' AND "Res." = 'loss'