Message type: E = Error
Message class:  HRPIQ00REGIST - Messages Related to Registration 
Message number: 006
Message text: Activity and end date of the registration must not be changed
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 HRPIQ00REGIST006 indicates that there is an issue with changing the activity and end date of a registration in the SAP system, specifically in the context of the SAP Human Capital Management (HCM) module, often related to the Personnel Development or Training and Event Management components.
Cause: This error typically occurs when: Data Integrity Rules: The system has built-in rules that prevent changes to certain fields (like activity and end dates) once a registration has been finalized or processed. This is to maintain data integrity and ensure that historical records remain consistent. Status of Registration: The registration might be in a status that does not allow changes. For example, if the registration is already confirmed or completed, the system may restrict modifications to prevent inconsistencies. Dependencies: There may be dependencies on other records or processes that rely on the original dates, making it impossible to change them without affecting other data.
Solution: To resolve
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
HRPIQ00REGIST005 Error while delimiting academic specializations; delimit them manually
What causes this issue?  An error occurred while you were delimiting the academic specializations during de-registration.System Response  The system h...
HRPIQ00REGIST004 Error while cancelling module bookings; cancel them manually
What causes this issue?  An error occurred while you were cancelling the module bookings during de-registration.System Response  The system has not ca...
HRPIQ00REGIST007 Enter a reason for the change of program
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPIQ00REGIST008 On &, the student has no study segment for this program
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.