CREATE TABLE table_48372 ("Season" FLOAT, "Team 1" CLOB, "Score" CLOB, "Team 2" CLOB, "Venue" CLOB)

Which season was there a game with the score of 1:3 played at the venue of national stadium, maldives?
SELECT SUM("Season") FROM table_48372 WHERE "Score" = '1:3' AND "Venue" = 'national stadium, maldives'
SELECT SUM("Season") FROM "table_48372" WHERE "Score" = '1:3' AND "Venue" = 'national stadium, maldives'