Internal error in program &1, access to table &2 with key &3' ' &4

What causes this issue?

Internal error in buffer management for technical objects.

System Response

The object could not be accessed.

How to fix this error?

Write down the steps that led to this error.
Contact your SAP system administrator.

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

Procedure for System Administrators

The error was recorded in the application log.
Transaction SLG1
Object PMTO
Sub-object BUFADM
The error can only be corrected by SAP with a program correction.

Error message extract from SAP system. Copyright SAP SE.