How To Fix 9J637 - & & cannot be entered twice

SAP Error Message - Details

• Message type: E = Error

• Message class: 9J -

• Message number: 637

• Message text: & & cannot be entered twice

What causes this issue?

Due to the availability calculation, you cannot enter a &V1& more than
once in a document.
The error also occurs if you delete an existing item or overwrite it
with another &V1& number and then try to enter the item again without
saving first.

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?

You cannot enter a &V1& more than once in a document.
If you have deleted an item with this &V1&, and you would now like to
enter this &V1& under another item:
Save the document.
Call the document again and enter the required &V1&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 9J637 - & & cannot be entered twice ?

  The SAP error message "9J637 & & cannot be entered twice" typically occurs in the context of data entry in SAP, particularly when dealing with certain transactions or data records where unique entries are required. This error indicates that the system has detected a duplicate entry for a field that must be unique.
  Cause:
  
  Duplicate Entry: The most common cause of this error is that the user is attempting to enter a value in a field that already contains that value. This could happen in various scenarios, such as entering a vendor, customer, or material number that already exists in the system.
  Configuration Settings: Certain configurations in the SAP system may enforce uniqueness for specific fields, leading to this error when duplicates are detected.
  Data Integrity Rules: The system may have built-in data integrity rules that prevent the same entry from being recorded multiple times.
  
  Solution:
  
  Check Existing Entries: Before entering a new record, check the existing entries in the relevant table or transaction to ensure that the value you are trying to enter does not already exist.
  Modify the Entry: If you find that the entry already exists, consider modifying the entry you are trying to create or update to ensure it is unique.
  Consult Documentation: Review the relevant SAP documentation or help files for the specific transaction you are working with to understand the uniqueness requirements.
  Contact Support: If you are unsure why the error is occurring or if you believe it is a system error, contact your SAP support team or administrator for assistance.
  
  Related Information:
  
  Transaction Codes: The error may occur in various transaction codes depending on the context (e.g., creating a vendor, customer, or material).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Authorization: Ensure that you have the necessary authorizations to create or modify the entries in question, as sometimes restrictions can lead to unexpected errors.
  
  If you continue to experience issues, providing additional context about the specific transaction or data entry process may help in diagnosing the problem further.