Understanding the Procedure for Upgrading S3 s3fs Proof Version 2 to 4 in AWS

For instructions on upgrading from S3 s3fs Proof Version 2 to 4 in AWS, see
Could you tell me?
If the signature version 2 remains, it will be discontinued on June 24.
US>This is because the S3 bucket object will no longer be accessible.

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The installation was handled many years ago by someone else.Therefore, the response of the predecessor is unknown.
I'll check with that person.
Thank you for your cooperation.