How To Fix 6D281 - Do not use 0 as internal key (see long text!)

SAP Error Message - Details

• Message type: E = Error

• Message class: 6D - Real Estate Messages

• Message number: 281

• Message text: Do not use 0 as internal key (see long text!)

What causes this issue?

You cannot save internal key 0 in the rental unit dialog as 0 is the
initial value of the field.

System Response

Use another internal key to enter Customizing data for a floor that you
want to maintain in the rental unit dialog.

How to fix this error?

You should keep a dummy entry for 0 so that rental units where no floor
data has been entered are still displayed with the 'General rental
units" matchcode search.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 6D281 - Do not use 0 as internal key (see long text!) ?

  The SAP error message 6D281 ("Do not use 0 as internal key (see long text!)") typically occurs when there is an attempt to use an internal key value of 0 in a context where it is not valid. This error is often related to the use of internal keys in various SAP modules, such as when dealing with document numbers, transaction codes, or other identifiers that require a unique key.
  Cause:
  
  Invalid Key Usage: The most common cause of this error is that the system is trying to process a record or transaction that has an internal key set to 0. In many cases, 0 is not a valid identifier for records in SAP, as it may indicate that no valid record exists.
  Data Entry Error: It could also be due to incorrect data entry or a missing value in a field that is supposed to contain a unique identifier.
  Configuration Issues: Sometimes, this error can arise from configuration issues in the system where the internal key generation is not set up correctly.
  
  Solution:
  
  Check Input Values: Review the input values for the transaction or process that triggered the error. Ensure that all required fields are filled out correctly and that no fields are inadvertently set to 0.
  Review Custom Code: If there is any custom code (e.g., ABAP programs, user exits, BAdIs) involved in the process, check to ensure that it is not inadvertently setting the internal key to 0.
  Data Consistency: Ensure that the data in the relevant tables is consistent and that there are no records with an internal key of 0. You may need to run consistency checks or data validation processes.
  Consult Documentation: Refer to the long text of the error message for additional context and guidance on how to resolve the issue. This can often provide specific instructions or references to relevant documentation.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide patches or updates that could resolve the issue.
  
  Related Information:
  
  Transaction Codes: Depending on the context of the error, you may want to look into transaction codes related to the specific module you are working with (e.g., MM, SD, FI).
  SAP Community: Engaging with the SAP Community forums can provide insights from other users who may have encountered the same issue.
  System Logs: Review system logs (transaction SLG1) for additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be necessary to involve your SAP Basis or development team for further investigation.