H2 select LIMIT and OFFSET with random()

In h2 dbms I have a table

CREATE TABLE sometable
( ID INTEGER NOT NULL AUTO_INCREMENT PRIMARY KEY,
  somevalue INTEGER)

And some data

INSERT INTO sometable(somevalue) 
VALUES (1), (2), (3), (4), (5);

When I SELECT somevalue FROM sometable LIMIT 1 OFFSET 2 it works. Why if I want to select random row the SELECT somevalue FROM sometable LIMIT 1 **OFFSET (RANDOM()*4) doesn't work?