How to fix SAP error TR326?

What causes this issue? The object name entered begins with the prefix &V1&, which indicates that the object belongs to <DS:DE.NAMESPACE>namespace</> &V1&. However, this namespace is not known to the system.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? Procedure for System Administrators Error message extract from SAP system. Copyright SAP SE.

How To Fix TR326 - Namespace &1 is unknown, check syntax

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SAP Error Message - Details

Message type: E = Error
Message class: TR - Change and Transport System
Message number: 326
Message text: Namespace &1 is unknown, check syntax
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What causes this issue?
The object name entered begins with the prefix &V1&, which indicates
that the object belongs to <DS:DE.NAMESPACE>namespace</> &V1&.
However, this namespace is not known to the system.
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?
Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

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What is the cause and solution for SAP error message TR326 - Namespace &1 is unknown, check syntax ?

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