How To Fix CNVMBTCHECK056 - &1| Foreign key value &2 will not be checked. (cluster/pool)

SAP Error Message - Details

• Message type: E = Error

• Message class: CNVMBTCHECK - Messages for PCL Checks

• Message number: 056

• Message text: &1| Foreign key value &2 will not be checked. (cluster/pool)

This migration object has a cluster or pooled table mentioned in its
table strucuture. Therefore the data dictionary checks will not be done
for this migration object.
For further assistance please refer to SAP support.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CNVMBTCHECK056 - &1| Foreign key value &2 will not be checked. (cluster/pool) ?

  The SAP error message CNVMBTCHECK056 indicates that a foreign key value is not being checked due to the nature of the data storage in a cluster or pool table. This typically occurs during data migration or conversion processes, particularly when using the SAP Data Migration Workbench or similar tools.
  Cause:
  
  Cluster/Pooled Tables: The error arises because the foreign key relationship is not enforced in cluster or pooled tables. These types of tables are designed for performance and storage efficiency, and as such, they do not support the same level of referential integrity checks as standard database tables.
  Data Migration: During data migration, if the system encounters a foreign key reference that cannot be validated against the target table, it will issue this warning.
  Inconsistent Data: The data being migrated may contain values that do not exist in the referenced table, leading to this error.
  
  Solution:
  
  Data Validation: Before performing the migration, ensure that all foreign key values in the source data exist in the target tables. This may involve running queries to check for orphaned records or values that do not match.
  Adjust Migration Logic: If the foreign key checks are not critical for your migration, you may choose to adjust the migration logic to bypass these checks. However, this should be done with caution, as it may lead to data integrity issues.
  Use Standard Tables: If possible, consider using standard tables instead of cluster or pooled tables for the migration process, as they support foreign key checks.
  Post-Migration Checks: After migration, perform data integrity checks to ensure that all foreign key relationships are valid and that there are no orphaned records.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error message. SAP frequently updates its documentation and provides solutions for known issues.
  Data Migration Tools: Familiarize yourself with the tools and methodologies used for data migration in SAP, such as the SAP Data Services or SAP S/4HANA Migration Cockpit, which may have built-in checks and balances for handling foreign key relationships.
  Documentation: Review the SAP documentation related to data migration and the specific tables involved to understand their structure and constraints better.
  
  If the issue persists after following these steps, consider reaching out to SAP support or consulting with an SAP expert for further assistance.