Message type: E = Error
Message class:  MI_MGMT - MI: Device Management 
Message number: 148
Message text: Device configuration already exists with this name
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 MI_MGMT148 indicates that there is an attempt to create a device configuration with a name that already exists in the system. This typically occurs in the context of managing mobile devices or configurations within the SAP Mobile Infrastructure (MI) or SAP Mobile Platform.
Cause: The error is caused by one of the following scenarios: Duplicate Configuration Name: You are trying to create a new device configuration with a name that is already in use by another configuration. Data Consistency Issues: There may be inconsistencies in the database or configuration settings that lead to the system not recognizing that the name is already in use. User Error: The user may have mistakenly entered a name that they believe is unique but is not.
Solution: To resolve the MI_MGMT148 error, you can take the following steps: Check Existing Configurations: Navigate to the device configuration management area in SAP. Look for the configuration name you are trying to create.
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
MI_MGMT146 Cannot change ROOT node
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
MI_MGMT145 Cannot delete object assigned to node
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
MI_MGMT149 You cannot assign two parameter sets of the same type
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
MI_MGMT150 Parameter set is assigned to device configuration and cannot be deleted
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.