How To Fix SO819 - Substitute has already been defined in the specified period

SO819 - Overview

• Message type: E = Error

• Message class: SO - SAPoffice: message texts

• Message number: 819

• Message text: Substitute has already been defined in the specified period

What causes this issue?

The substitute specified is already defined in your substitute list for
this period.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Change the substitute or substitution period.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SO819 - Substitute has already been defined in the specified period ?

  The SAP error message SO819, which states "Substitute has already been defined in the specified period," typically occurs in the context of the SAP system when dealing with substitutes for employees or resources. This error indicates that there is an attempt to assign a substitute for a person or resource during a time period where a substitute has already been defined.
  
  Cause:
  
  Duplicate Substitution Entry: The primary cause of this error is that there is already an existing substitution entry for the specified period. This means that the system has detected that a substitute has already been assigned for the same time frame.
  Incorrect Date Range: The dates you are trying to assign for the substitute may overlap with an existing entry.
  
  Configuration Issues: There may be issues with how the substitution functionality is configured in the system.
  
  
  Solution:
  
  
  Check Existing Substitutions: 
  
  Navigate to the substitution management area in SAP (usually found under the "Personal Management"