In the material master record, a total shelf life has been specified. Therefore, the system interprets the date you entered as the production date and calculates the shelf life expiration date on the basis of this production date plus the total shelf life.
The date you entered lies in the future.
Depending on how the system is set, this message is either a warning or an error message.
Make sure your entries are correct.
Do not enter the expiration date of the material but its production date.