How To Fix AXT_MODEL202 - Existing table &1 cannot be a child of the new table &2

SAP Error Message - Details

• Message type: E = Error

• Message class: AXT_MODEL -

• Message number: 202

• Message text: Existing table &1 cannot be a child of the new table &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message AXT_MODEL202 - Existing table &1 cannot be a child of the new table &2 ?

  The SAP error message AXT_MODEL202 indicates that there is an issue with the relationship between two tables in the data model. Specifically, it means that the existing table (denoted as &1) cannot be a child of the new table (denoted as &2) due to some constraints or rules in the data model.
  Cause:
  
  Invalid Relationship: The existing table may not have a valid foreign key relationship with the new table. This could be due to missing or incorrect foreign key definitions.
  Data Model Constraints: The data model may have constraints that prevent the existing table from being a child of the new table. This could be due to the nature of the data or the way the tables are structured.
  Hierarchy Issues: If the existing table is already a parent or has a different hierarchical relationship with other tables, it cannot be redefined as a child of the new table.
  Incompatible Data Types: The data types of the key fields in the existing table and the new table may not match, which can prevent the establishment of a parent-child relationship.
  
  Solution:
  
  Check Foreign Key Relationships: Review the foreign key relationships between the tables. Ensure that the existing table has a valid foreign key that points to the new table.
  Review Data Model Design: Analyze the overall data model to ensure that the intended relationships make sense. If necessary, redesign the model to accommodate the required relationships.
  Adjust Hierarchies: If the existing table is already part of another hierarchy, consider whether it can be removed from that hierarchy or if the new table can be adjusted to fit the existing structure.
  Data Type Compatibility: Ensure that the key fields used for the relationship between the two tables have compatible data types. If they do not match, you may need to adjust the data types accordingly.
  Consult Documentation: Refer to SAP documentation or guidelines for data modeling to ensure compliance with best practices.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Data Model Documentation: Review the documentation for the specific data model you are working with to understand the intended relationships and constraints.
  Community Forums: Consider searching or posting in SAP community forums for insights from other users who may have encountered similar issues.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with an SAP expert or your organization's SAP support team for further assistance.