How to fix SAP error CNV_DMC_SIN441?

What causes this issue? Before you start with the initial data transfer, you must define an overall migration key date for each company code. This customizing step has not been performed for the company code &V1& so far.System Response How to fix this error? Use app "Define Settings for Legacy Data Transfer" to maintain the required initial migration key date for relevant company codes. Set the "Legacy Data Transfer Status" to: In Preparation migration key date is still in clarification Migration of transactional data will not be possible Ongoing required for the initial data transfer Migration of transactional data will be possible Completed After successful initial data transfer Migration of transactional data will not be possibleError message extract from SAP system. Copyright SAP SE.

How To Fix CNV_DMC_SIN441 - Missing settings of migration key date for company code &1

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CNV_DMC_SIN441 - Overview

Message type: E = Error
Message class: CNV_DMC_SIN - Messages for s-innovations migration
Message number: 441
Message text: Missing settings of migration key date for company code &1
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What causes this issue?
Before you start with the initial data transfer, you must define an
overall migration key date for each company code.
This customizing step has not been performed for the company code &V1&
so far.
System Response
How to fix this error?
Use app "Define Settings for Legacy Data Transfer" to maintain the
required initial migration key date for relevant company codes.
Set the "Legacy Data Transfer Status" to:
In Preparation
migration key date is still in clarification
Migration of transactional data will not be possible
Ongoing
required for the initial data transfer
Migration of transactional data will be possible
Completed
After successful initial data transfer
Migration of transactional data will not be possible

Error message extract from SAP system. Copyright SAP SE.

CNV_DMC_SIN441 - Details

Error Code: CNV_DMC_SIN441
Error Message: Missing settings of migration key date for company code &1

Summary
This error indicates that the system lacks the required migration key date configuration for the specified company code during a data migration or conversion process. Without this date, the system cannot correctly process or validate migration data for that company code.

Root Causes
The migration key date has not been maintained or configured for the company code in the migration cockpit or related customizing.
Incomplete or missing entries in the migration settings tables that define key dates for company codes.
User oversight during migration project setup, forgetting to assign or confirm the migration key date.
Transport or system copy issues where migration settings were not properly moved or activated.
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