Message type: E = Error
Message class:  CM_EHFND_CNS_TM - Message Class for the Task Management Consumption 
Message number: 051
Message text: Workitem with ID "&1" is not a recognized step.
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CM_EHFND_CNS_TM051 indicates that a work item with a specific ID is not recognized as a valid step in the process. This error typically occurs in the context of workflow management or process orchestration within SAP systems, particularly in the SAP Cloud Platform or SAP S/4HANA environments.
Cause: Invalid Work Item ID: The work item ID referenced in the error message may not exist or may have been deleted or archived. Workflow
Configuration Issues: There may be issues with the workflow configuration, such as missing steps or incorrect definitions. Transport Issues: If the workflow was transported from one system to another, there may be inconsistencies or missing components in the target system. Authorization Issues: The user may not have the necessary authorizations to access the work item or the associated workflow. System Errors: There could be underlying system errors or inconsistencies in the database that prevent the work item from being recognized.
Solution: Verify Work
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CM_EHFND_CNS_TM050 Create a business partner for user "&1".
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CM_EHFND_CNS_TM049 Cannot determine agent for workitem with ID "&1"
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CM_EHFND_CNS_TM060 &1 tasks were successfully forwarded to &2.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CM_EHFND_CNS_TM061 &1 tasks were not forwarded.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.