Message type: E = Error
Message class:  LCAM_REG -  
Message number: 019
Message text: The selected task has been handed over
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 LCAM_REG019 ("The selected task has been handed over") typically occurs in the context of warehouse management or logistics execution processes. This error indicates that the task you are trying to process has already been handed over to another user or system, meaning it is no longer available for the current user to execute.
Cause:
Task Already Assigned: The task has already been assigned to another user or has been processed by another system.
Concurrency Issues: Multiple users or processes are trying to access or modify the same task simultaneously.
Session Timeout: If a user has been inactive for a period, the system may automatically hand over the task to ensure it is processed in a timely manner.
Solution:
Refresh the Task List: Refresh your task list to see if the task is still available or if it has been reassigned.
Check Task Status: Verify the status of the task in the system. If Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
LCAM_REG018 Data inconsistent; either check task attributes or check for later tasks
What causes this issue?  Selection data for regular task scheduling has been incorrectly specified.System Response  Regular task scheduling cannot pro...
LCAM_REG017 Overlapping records exist in work rule schedule or daily work rule
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
LCAM_REG020 Cannot delete; shift &1 has business data
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
LCAM_REG021 Data saved
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.