How To Fix SDME_MDB306 - &1 already exists under the alias &2

SDME_MDB306 - Overview

• Message type: E = Error

• Message class: SDME_MDB - DME: Maintenance Dialog Builder

• Message number: 306

• Message text: &1 already exists under the alias &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDME_MDB306 - &1 already exists under the alias &2 ?

  The SAP error message SDME_MDB306 indicates that there is a conflict with an existing entry in the system. Specifically, it means that an object (such as a material, customer, or vendor) already exists under a specified alias, which is causing a duplication issue.
  
  Cause:
  The error typically arises in scenarios where:
  
  You are trying to create or modify an entry in the SAP system that already exists.
  There is an attempt to assign an alias to an object that is already associated with another entry.
  Data inconsistencies or duplicate entries in the database.
  
  
  Solution:
  To resolve the SDME_MDB306 error, you can take the following steps:
  
  
  Check Existing Entries:
  
  Use transaction codes like SE11 (Data Dictionary) or SE16 (Data Browser) to check the database tables related to the object you are trying to create or modify.
  Look for the entry that corresponds to the alias mentioned in the error message.
  
  
  
  Modify or Delete Existing Entry:
  
  If the existing entry is valid and should