Message type: E = Error
Message class: DA - Dictionary: Compare, distribution, timer, instantiation
Message number: 649
Message text: Primary key changed to inverted hash
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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
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