Message type: E = Error
Message class:  U6 - Message Class for BRE 
Message number: 137
Message text: No entries in table &1 for identifier &2
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 U6137, which states "No entries in table &1 for identifier &2," typically indicates that the system is unable to find any entries in a specified table for a given identifier. This can occur in various contexts, such as when trying to access configuration data, master data, or transactional data.
Cause: Missing Data: The most common cause is that the relevant data has not been maintained in the specified table. This could be due to data not being created, deleted, or not yet imported. Incorrect Identifier: The identifier provided may be incorrect or not exist in the system. This could be due to a typo or misunderstanding of the identifier's format. Authorization Issues: Sometimes, the user may not have the necessary authorizations to view the data in the specified table.
Configuration Issues: If the system is not properly configured, it may not be able to retrieve the necessary data.
Solution: Check Data Maintenance: Verify
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
U6136 Activity category &1 not permitted for backlog reduction engine
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
U6135 Caution: Deletion report
What causes this issue?  This program deletes the fields for agent determination in the error extract table (INSTSET). If you use the agent determinat...
U6138 Backlog set &1: No entries in table &2 for selection entered
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
U6139 Backlog set &1: None of the entries to be processed exist in table &2
What causes this issue?  There is no entry with the indicator 'Extract Generated Again' for the specified selections.System Response  The sy...
Click on this link to search all SAP messages.