SYST: error updating tab. & key: & & &

What causes this issue?

The record specified with the following key fields cannot be changed in
table &V1&:

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

Field 1: &V2&
Field 2: &V3&
Field 3: &V4&

System Response

How to fix this error?

Contact your system administrator.

Error message extract from SAP system. Copyright SAP SE.