Print & is not valid in this client

What causes this issue?

In transaction SPAD, you set a client restriction on this printer. You
therefore cannot use this printer in this client.

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?

Use the printer in a different client.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.