How To Fix CNVMBTPLK004 - Insert of new or changed key into internal table ended with error

CNVMBTPLK004 - Overview

• Message type: E = Error

• Message class: CNVMBTPLK - SAP LT production lock

• Message number: 004

• Message text: Insert of new or changed key into internal table ended with error

Self-Explanatory Message

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CNVMBTPLK004 - Details

• The SAP error message CNVMBTPLK004 typically occurs during data migration or conversion processes, particularly when using the SAP Migration Cockpit or similar tools. This error indicates that there was an issue with inserting a new or changed key into an internal table, which can be caused by various factors.
  Causes:
  
  Duplicate Keys: The most common cause is that the key being inserted already exists in the internal table, leading to a violation of unique constraints.
  Data Type Mismatch: There may be a mismatch between the data types of the key being inserted and the expected data types in the internal table.
  Null or Invalid Values: Attempting to insert null or invalid values into fields that do not allow them can also trigger this error.
  Memory Issues: If the internal table is too large or if there are memory constraints, it may lead to errors during insertion.
  Incorrect Configuration: Misconfiguration in the migration settings or mapping can