You can update an md5-password on an active fabric.
Note
Run the efa fabric topology show underlay --name <fabric-name> command to get the latest status of the BGP session.efa fabric setting update --name fabric1 --md5-password-enable Yes --md5-password 'newpassword'
WARNING: configuring/clearing md5-password on an active fabric will result in BGP neighbor sessions going down for a brief period when the fabric is reconfigured. Please confirm if you want to continue with the fabric setting update [y/n]?y fabric1 Fabric Update Successful
efa fabric configure --name fabric1 Validate Fabric [Success] Configure Fabric [Success]
10.25.225.11 : Operation[BGP Session(s) Clear Operation] has succeeded with the warning:[BGP neighbor session 10.20.20.121 is in CONN state and could not be established]