Message type: E = Error
Message class:  HRPAYAT_KSB - Messages for Sick Leave Certificates 
Message number: 205
Message text: Grouping not valid (&1, &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 HRPAYAT_KSB205 "Grouping not valid (&1, &2)" typically occurs in the context of payroll processing in the SAP HR module, particularly in the Austrian payroll (as indicated by the "AT" in the message code). This error indicates that there is an issue with the grouping of payroll elements or wage types that are being processed.
Cause: Invalid Grouping Configuration: The error usually arises when the payroll system encounters a grouping that is not defined or is incorrectly configured in the system. This could be due to: Missing or incorrect entries in the configuration tables related to payroll processing. The grouping being used does not exist in the system or is not valid for the specific payroll run. Changes in the payroll schema or wage type configuration that have not been properly updated. Data Entry Errors: Incorrect data entries in employee master data or payroll results can also lead to this error. For example,
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
HRPAYAT_KSB204 Insertion, mapping not valid (&1, &2 - &3)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPAYAT_KSB203 Absence type cannot be changed (&1, &2 - &3)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPAYAT_KSB206 Time data cannot be maintained (&1, &2)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
HRPAYAT_KSB207 Adjust, mapping not valid (&1, &2 - &3)
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.