Message type: E = Error
Message class:  HRRSM00 - Process External HR Master Data 
Message number: 003
Message text: An employee with this ID was already hired
Hiring data for the employee with external personnel identification
&V2& was already uploaded from sender system &V1&.
The HR system cannot process this data further. It can only be
displayed.
The processing status in the worklist changes to "STOP."
The data for the employee with this personnel number can be removed
from the worklist using the reorganization function.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message HRRSM00003, which states "An employee with this ID was already hired," typically occurs in the context of the SAP Human Capital Management (HCM) module when there is an attempt to hire an employee using an ID that is already associated with an existing employee record in the system. Here’s a breakdown of the cause, potential solutions, and related information:
Cause: Duplicate Employee ID: The most common cause is that the employee ID you are trying to use for hiring is already assigned to another employee in the system. Incorrect Data Entry: There may have been a mistake in entering the employee ID, leading to an attempt to hire an employee that already exists. Data Migration Issues: If data has been migrated from another system, there may be duplicate records or IDs that were not cleaned up properly. Re-hiring: If you are trying to re-hire an employee who has previously been terminated,
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