How To Fix DA649 - Primary key changed to inverted hash

SAP Error Message - Details

• Message type: E = Error

• Message class: DA - Dictionary: Compare, distribution, timer, instantiation

• Message number: 649

• Message text: Primary key changed to inverted hash

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DA649 - Primary key changed to inverted hash ?

  The SAP error message DA649, which states "Primary key changed to inverted hash," typically occurs in the context of database operations, particularly when dealing with hashed tables in ABAP (Advanced Business Application Programming). This error indicates that the primary key of a hashed table has been modified in a way that is not compatible with the existing hash structure, leading to potential data integrity issues.
  Cause:
  
  Modification of Primary Key: The primary key of a hashed table has been changed after the table was created. This can happen if the structure of the table is altered in a way that affects the hashing mechanism.
  Inconsistent Data: If the data in the table does not conform to the expected structure of the primary key, the system may revert to an inverted hash to maintain data integrity.
  Database Changes: Changes in the underlying database schema or data types that affect the hashed table can also lead to this error.
  
  Solution:
  
  Check Table Definition: Review the definition of the hashed table to ensure that the primary key is correctly defined and has not been altered inappropriately.
  Data Consistency: Ensure that the data in the table is consistent with the primary key definition. You may need to clean up or correct any inconsistent entries.
  Recreate the Table: If the issue persists, consider recreating the hashed table. This involves:
  
  Backing up the data.
  Dropping the existing table.
  Creating a new table with the correct primary key definition.
  Restoring the data into the new table.
  
  
  Check for Updates: Ensure that your SAP system is up to date with the latest patches and updates, as this may resolve underlying issues related to the error.
  
  Related Information:
  
  Documentation: Refer to the SAP Help Portal or the ABAP documentation for more details on hashed tables and primary key definitions.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Engage with the SAP community forums or support channels for insights from other users who may have encountered similar issues.
  
  If the problem continues after trying the above solutions, it may be beneficial to consult with your SAP Basis or ABAP development team for further investigation and resolution.