What happens if a mage dies with multiple clones?

Imagine that a PC has created multiple clones, through the casting of clone, each matured.

What happens when that PC dies and declares his soul willing to go to each clone? I understand that the character could avoid this problem by declaring himself only willing to go to one particular clone, but if he did not, what would happen?

Would he occupy his first clone? The most recent? A random one? One of the player’s choosing? DM’s choosing? Or is it just DM perview?