The shelf life expiration date you specified comes before the posting date.
Depending on how the system is set, this message is either a warning or an error message.
If the message is a warning, the system indicates that you are entering the receipt of a material whose shelf life expiration date has already passed.
If the message is an error message, this indicates that the system will not accept the receipt of a material that has already expired.
Make sure your entries are correct.