System-dependent data for entry &1 changed: &2 / &3

What causes this issue?

When accessing the secure storage, the system detected that
system-dependent data (installation number or system ID) had been
changed.
Entry data: &V2&
Current system data: &V3&
If you receive this message during a migration process, the "Current
system data" field contains the old specified system data instead of the
current system data.
The content of both fields can also be empty, if the system cannot
determine the data in the current context.

System Response

It is no longer possible to access entries that were created with the
previous data.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

For more information, see SAP Note 816861.

Error message extract from SAP system. Copyright SAP SE.