Message type: E = Error
Message class:  CTS_ORGANIZER_MSG - Message Class for the Transport Organizer 
Message number: 053
Message text: Transport request &1 cannot be changed since it is from client &2
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The SAP error message CTS_ORGANIZER_MSG053 indicates that a transport request cannot be changed because it originates from a different client. This typically occurs in systems where multiple clients are used, and the transport request is locked to the client it was created in.
Cause: Client-Specific Transport Requests: Transport requests are often client-specific, meaning they are tied to the client in which they were created. If you attempt to modify a transport request from a different client, SAP will prevent this action to maintain data integrity. Cross-Client Transport: If you are trying to transport objects that are not meant to be transported across clients, this error will occur. Authorization Issues: Sometimes, the user may not have the necessary authorizations to change transport requests in the specified client.
Solution: Check Client: Ensure that you are in the correct client where the transport request was created. You can switch to the appropriate client using the client selector in the
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