Message type: E = Error
Message class:  CNV_MBT_46 - PCL message class 
Message number: 376
Message text: Migration Object already exists
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 CNV_MBT_46376 indicates that a migration object already exists in the system. This error typically occurs during the data migration process when using the SAP S/4HANA Migration Cockpit or other migration tools. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Duplicate Migration Object: The error arises when the system detects that a migration object with the same identifier already exists in the target system. This can happen if: The migration process was previously executed and not completed successfully. There was an attempt to create a migration object that has already been created in a prior run. Incorrect Configuration: Sometimes, the configuration settings for the migration might lead to the creation of duplicate objects. Data Consistency Issues: If there are inconsistencies in the data being migrated, it may lead to the creation of duplicate entries. Solutions: Check Existing Migration Objects: Use transaction codes like LTMC (for Migration Cockpit) to check if the migration
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV_MBT_46375 Error in updating the tree; data is inconsistent
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46374 Error in creating tree; data is inconsistent
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46377 Duplicate entries, with same fieldname
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV_MBT_46378 Error in creating ICON
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.