Message type: E = Error
Message class:  CNV - Conversion: Messages for Conversion Services (CNCC) 
Message number: 767
Message text: Index & for table & did not exist in the database before the conversion
Index &V1& for table &V2& did not exist in the database already before
the conversion. However it was selected manually to be dropped during
the conversion.
The index will not be recreated, because the reason for that it didn't
exist is unknown.
If you are sure that the index should exist create in manually using
Database Utility (transaction code SE14).
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV767 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 an index for a specific table did not exist in the database prior to the conversion process. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Missing Index: The error suggests that the index specified in the error message was expected to be present in the database but was not found. This can happen if the index was not created or was dropped before the conversion process. Data Model Changes: If there have been changes in the data model (e.g., changes in the structure of the database tables or indexes) that were not properly accounted for during the migration, this error can occur. Incorrect Configuration: The migration configuration might be incorrect, leading to the expectation of an index that does not
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNV766 Program & is not meant to run in system &
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV765 Unique secondary index & of table & can cause duplicates.
What causes this issue?  A unique secondary index was found.System Response  The system issues an error message and will not allow you to continue wit...
CNV768 The check for index & for table & was not completed successfully
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNV770 No index was dropped during the 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.