Delete message attribute

What causes this issue?

You have entered a message attribute for a device.
You cannot enter a message attribute in the following cases:
The device is not an advanced meter.
No AMS (advanced metering system) and AMCG (advanced meter capability
group) are assigned to the device.
The assigned AMS (advanced metering system) and AMCG (advanced meter
capability group) do not have the capability to receive text messages.

System Response

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

How to fix this error?

Delete the message attribute.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.