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

9J637 - Overview

• 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