Answer
Moderation for an attempt to post a message to a list has expired so GMS has discarded the message. The moderation time is 96 hours by default but it may have been changed by the administrator. There may be more than one person who can moderate (or allow) the messages to be posted.
In this case, a post to the list Undefined has been discarded.
This is the correct result, no action is required by you.
See Also:
Keywords:post moderation expired 8417