Can't fix google play apk upload error "you uploaded an APK signed with a certificate that is not yet valid"

I tried to upload my first apk app on google play store but there is an error said

"You uploaded an APK signed with a certificate that is not yet valid. You need to sign your APK with a certificate that is currently valid."

I did a lot of searches to fix this error The result I found was

• change system clock to a few days earlier and generate a new keystore

• change system clock time zone and generate a new keystore

• rename the apk

• wait for a day after generated a keystore

I've tried all but they are not work.(my time zone is GMT+7)

Does anyone has another solution? tell me plese. ][^][

Thanks everyone who read this :)