How To Fix E7070 - Standard customer &1 already exists

E7070 - Overview

• Message type: E = Error

• Message class: E7 - IS-U master data

• Message number: 070

• Message text: Standard customer &1 already exists

What causes this issue?

You have attempted to create a customer with the help of a reference
customer using the transaction 'Create business partner'. However,
there is already a customer with the number of the business partner in
the 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?

Check the number range for the customer and business partner. Also
check the system parameters in table TEKND.

Error message extract from SAP system. Copyright SAP SE.

E7070 - Details

• The SAP error message E7070, which states "Standard customer &1 already exists," typically occurs when you are trying to create a customer master record in the SAP system, but a customer with the same identifier (usually the customer number) already exists in the system. This can happen in various modules, such as Sales and Distribution (SD) or Financial Accounting (FI).
  
  Cause:
  
  Duplicate Customer Number: The most common cause is that the customer number you are trying to create is already in use for another customer record.
  Data Migration Issues: If you are migrating data from another system or performing a mass upload, there may be duplicates in the data being imported.
  Incorrect Input: Sometimes, the error can arise from a simple typographical error in the customer number field.
  
  
  Solution:
  
  
  Check Existing Customers: Before creating a new customer, check the existing customer records to see if the customer number you are trying to use is already assigned.