Message type: E = Error
Message class:  CNV20410 - message class for package 20410 (operating concern merge) 
Message number: 019
Message text: Table field &1-&2 included for conversion (excluded before)
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 CNV20410019 indicates that a specific table field, identified by the placeholders &1 (table name) and &2 (field name), has been included for conversion in a data migration or conversion process, even though it was previously excluded. This message typically arises during data migration activities, particularly when using SAP's data migration tools or during system conversions.
Cause: Configuration Changes: The field may have been included in the conversion configuration after the initial setup, leading to this message. Data Model Changes: Changes in the data model or business requirements may necessitate the inclusion of previously excluded fields. Inconsistent Migration Settings: There may be inconsistencies in the migration settings or configuration files that led to the field being included unexpectedly.
Solution: Review Migration Settings: Check the migration settings or configuration to understand why the field was included. Ensure that the inclusion aligns with your data migration strategy. Adjust Configuration: If the inclusion of the field is
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20410018 Cannot set lock entry. Activity is still running.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20410011 Process table &1, task number &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20410020 Failed to load mapping table for mapping template &1 with namespace &2
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20410021 Table field &1-&2 excluded from conversion
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.