Fix syntax error

pgsql-schema.sql

@@ -92,7 +92,7 @@ RETURNS bigint AS $$
                         flow_start_sec, flow_start_usec,
                         flow_end_sec, flow_end_usec, ct_event)
                 VALUES ($1,$2,$3,$4,$5,$6,$7,$8,$9,$10,$11,$12,$13,$14,$15,$16,$17,$18,$19,$20,$21,$22,$23,$24);
-        RETURN $1;
+        $1;
 $$ LANGUAGE SQL SECURITY INVOKER;
 
 CREATE OR REPLACE FUNCTION INSERT_OR_REPLACE_CT(