Message type: E = Error
Message class:  CNV20551 - message for package 20551 (company code delete) 
Message number: 680
Message text: Table & could not be accepted
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 CNV20551680 typically occurs during data migration or conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or other data migration tools. This error indicates that a specific table could not be accepted due to issues with the data or the configuration.
Cause: Data Validation Issues: The data in the table may not meet the required validation rules or constraints defined in the target system. Mapping Errors: There may be discrepancies in the mapping of fields between the source and target tables. Missing Required Fields: Required fields in the target table may not have corresponding data in the source table. Data Type Mismatches: There could be mismatches in data types between the source and target systems.
Configuration Issues: The configuration settings for the migration process may not be correctly set up.
Solution: Check Data Quality: Review the data in the source table for any inconsistencies, missing values, or invalid entries. Clean the data as
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV20551679 Investment Program Position &2 superior to &4 is not defined
What causes this issue?  Investment program positions have a hierarchical relationship. Higher-level investment program position &V1& (investm...
CNV20551678 Client-indep. table &1 is filled
What causes this issue?  Client-independent table &V1& is filled. These tables are used for reporting in CO-PA profitability analysis.System R...
CNV20551681 Pool &1 excluded from conversion (pool is obsolete)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV20551682 In CNVDOMS was EXCLUDE set for: DOMNAME=&1, ROLLNAME=&2, CONVFUNC=&3
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.