timestamp warning on export

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:bust_in_silhouette: Asked By Pratik

exporting my apk gives a warning that jar doesnt contain a timestap

jar verified
Warning:
This jar contains signatures that does not include a timestamp. Without a timestamp, 
users may not be able to validate this jar after the signer certificate's expiration date 
(2045-12-27) or after any future revocation date.

Re-run with the -verbose and -certs options for more details.

how to solve this