Saying license expired, but validity was 365 days and I used AE only for 60 days

Saying license expired, but validity was 365 days and I used AE only for 60 days.
After uploading license file below error showing
LERR-1003 License validation failed.

Hi,

Request to kindly regenerate the license. It may have been that license was generated earlier or there has been some alteration with your system time

Regards,
Amit