How To Fix CNV20400031 - Table &1 has a relevant domain for conversion in its key, but no SUMUP

CNV20400031 - Overview

• Message type: E = Error

• Message class: CNV20400 - Message class CNV20400

• Message number: 031

• Message text: Table &1 has a relevant domain for conversion in its key, but no SUMUP

What causes this issue?

If two or more records of a table are to be merged, it must be clear
how the fields in the data part of these records should be handled.
Otherwise, the conversion program for this table would terminate,
because a table must not contain two records that have the same key,
but different data parts.
To avoid this, you use the SUMUP indicator to specify the handling of
the data fields:
If you want the relevant field contents to be totaled, enter the value
'S' for the SUMUP indicator.
If you want the data field content of one of the table records that
will be merged to apply for the target record, enter the value 'A' for
the SUMUP indicator.
Records are meant to be merged in table &V1&. However no value has been
specified for the SUMUP indicator.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

In transaction CNV_TABLES, set the SUMUP indicator for the relevant
table to the required value (A or S).
Note: If the view is not changeable, call program
CNV_00001_ENABLE_MAINTENANCE to make the view changeable and then try
again.
If a priority routine is needed as well, specify the routine (in
transaction CNV_STEPS) and set the priority indicator (in transaction
CNV_FIELDS).

Error message extract from SAP system. Copyright SAP SE.

CNV20400031 - Details

• The SAP error message CNV20400031 indicates that there is a problem with a specific table during a data conversion process, typically related to the SAP S/4HANA migration or data transfer activities. The message states that the table in question has a relevant domain for conversion in its key, but there is no SUMUP defined for that domain.
  
  Cause:
  
  Domain Definition: The domain associated with the key field of the table does not have a SUMUP defined. SUMUP is a mechanism in SAP that allows for the aggregation of values based on certain criteria, and it is necessary for the conversion process to handle the data correctly.
  Data Model Changes: If the table structure or the associated domains have been modified or are not aligned with the expected data model for the conversion, this error can occur.
  
  Configuration Issues: There may be configuration issues in the data conversion settings that prevent the system from recognizing