Server "&1" cannot see key "&2"

What causes this issue?

The current encryption key "&V2&", determined on this server, cannot be
seen on server "&V1&", which belongs to this system.

System Response

It is only possible to re-encrypt entries using the current encryption
key if all servers of the system can see the same data status in the
secure storage in the file system.

How to fix this error?

The secure storage in the file system is a system-wide component. All
servers of the system must see the same data.
The fact that this is obviously not the case indicates that there is an
error in the configuration.
The profile parameter "rsec/ssfs_datapath" specifies the path of the
data file of the secure storage in the file system. This path must be on
a file system with shared access.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.