Message type: E = Error
Message class:  UKM_CU - Messages for UKM Customizing 
Message number: 015
Message text: In group &1, row &2 and column &3 are already occupied
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.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message UKM_CU015 indicates that there is an issue with the configuration of a certain group, specifically that a particular row and column in that group are already occupied. This error typically arises in the context of customizing or configuring certain settings in SAP, such as in the area of credit management or other similar modules.
Cause: The error occurs when you attempt to assign a value or configuration to a specific row and column in a group that has already been assigned or occupied by another value. This can happen due to: Duplicate Entries: You may be trying to create or modify an entry that already exists in the specified location. Incorrect Configuration: The configuration settings may not be set up correctly, leading to conflicts. Data Integrity Issues: There may be issues with the data integrity in the system, causing unexpected behavior.
Solution: To resolve the error, you can take the following steps: Check Existing
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
UKM_CU013 Select a status that permits the processing of credit limit requests
What causes this issue?  The selected status &V1& is not intended for reopening credit limit requests.System Response  The system issues an er...
UKM_CU012 Select a status that closes credit limit requests
What causes this issue?  The selected status &V1& is not intended for closing credit limit requests.System Response  The system issues an erro...
UKM_CU016 Enter a valid value
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
UKM_CU017 Only case types FDCD, FDCA, or YFCR are permitted here
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.