How To Fix TK151 - Table key is longer than & characters

SAP Error Message - Details

• Message type: E = Error

• Message class: TK - Transport Organizer

• Message number: 151

• Message text: Table key is longer than & characters

What causes this issue?

The total length of the table exceeds the maximum supported length in
the Change and Transport System.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Enter a generic key (with <LS>*</> at the end of the key).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message TK151 - Table key is longer than & characters ?

  The SAP error message TK151, which states "Table key is longer than & characters," typically occurs when you are trying to create or modify a table in the Data Dictionary (SE11) and the key length exceeds the maximum allowed limit. In SAP, the maximum length for a table key is 32 characters.
  Cause:
  The error is caused by defining a primary key or a unique key for a database table that exceeds the maximum allowed length of 32 characters. This can happen if:
  
  You are trying to include too many fields in the key.
  The combined length of the fields in the key exceeds the limit.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Key Fields: Check the fields you have included in the primary key or unique key. Ensure that the total length of the key does not exceed 32 characters.
  
  
  Reduce Key Length:
  
  Remove Unnecessary Fields: If possible, remove fields from the key that are not essential for uniquely identifying a record.
  Use a Surrogate Key: Consider using a surrogate key (like a numeric ID) as the primary key instead of a composite key made up of multiple fields.
  
  
  
  Re-define the Key: After making the necessary adjustments, re-define the key in the Data Dictionary (SE11) and activate the table.
  
  
  Check for Dependencies: If the table is already in use, ensure that any changes you make do not affect existing applications or data integrity.
  
  
  Related Information:
  
  Data Dictionary (SE11): This is the transaction code used to access the Data Dictionary in SAP, where you can create and modify database tables.
  Key Fields: In SAP, key fields are used to uniquely identify records in a table. The design of these keys is crucial for database integrity and performance.
  SAP Documentation: For more detailed information, refer to the official SAP documentation or help resources related to Data Dictionary and table design.
  
  By following these steps, you should be able to resolve the TK151 error and successfully define your table key within the allowed limits.