How To Fix OH018 - Entry already exists in group &: & - &

SAP Error Message - Details

• Message type: E = Error

• Message class: OH - Messages Group Maintenance

• Message number: 018

• Message text: Entry already exists in group &: & - &

What causes this issue?

The value you specified already exists in another node, or there is an
interval overlap.
When you insert nodes from other group structures, the values/intervals
below these nodes are also inserted. For each of these entries, an
ambiguity check is also arried out.

System Response

The entry is not accepted for CO groups (except for account groups).

How to fix this error?

Make sure that when you insert nodes there are no overlaps when you
directly (or indirectly) insert new values/intervals.
&HINT&
In order to be able control the <DS:DE.DCIND>Plus/Minus processing
(Report Writer)</>, duplicate values are permitted for account groups.
Duplicate values are only necessary here if an account occurs no more
than twice, and the P/M indicator (the <ZH>Settings for Reports</>
function to be found under the <ZH>Extras</> menu ) is set differently
for this account.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message OH018 - Entry already exists in group &: & - & ?

  The SAP error message OH018 ("Entry already exists in group &: & - &") typically occurs when you are trying to create or modify an entry in a group (such as a master data group) that already contains an entry with the same key or identifier. This can happen in various contexts, such as when dealing with material master data, customer/vendor master data, or other grouped entries.
  Cause:
  
  Duplicate Entry: The most common cause of this error is that you are attempting to create a new entry that has the same key or identifier as an existing entry in the specified group.
  Data Migration Issues: If you are migrating data from another system or performing bulk uploads, there may be duplicates in the data being imported.
  Incorrect Configuration: Sometimes, the configuration settings for the group may not allow for duplicate entries, leading to this error.
  
  Solution:
  
  Check Existing Entries: Before creating a new entry, check the existing entries in the group to ensure that there is no duplicate. You can do this by using transaction codes like SE16 or SE11 to view the relevant database tables.
  Modify Existing Entry: If you find that the entry already exists and you need to make changes, consider modifying the existing entry instead of creating a new one.
  Data Cleanup: If you are migrating data, ensure that your data is clean and does not contain duplicates. You may need to deduplicate your data before importing it into SAP.
  Consult Documentation: Review the relevant SAP documentation or configuration settings to understand the rules governing the group you are working with.
  Error Handling: Implement error handling in your data upload or entry process to catch and manage duplicates before they cause issues.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes relevant to the data you are working with (e.g., MM01 for material master, XK01 for vendor master).
  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 entries in the group.
  Support: If the issue persists, consider reaching out to your SAP support team or consulting with SAP Community forums for additional assistance.
  
  By following these steps, you should be able to resolve the OH018 error and successfully manage your entries in SAP.