Stuck in SMS Sent Items "[no sender] [no subject]"

[Yankees368]

Since yesterday, there has been an SMS stuck in the Sent Items folder that just reads [no sender] [no subject]. It always has the current time, and is on the top of the list. I cannot get rid of it, not even by clearing all SMS's. Because of this, PocketCM crashed while trying to load my sent SMS, every time. Can anyone give me a tip on how to get rid of this? Nothing seems to work, short of a hard-reset.