How To Fix 12139 - Enter a valid year

12139 - Overview

• Message type: E = Error

• Message class: 12 - Herstelldatum/Mindesthaltbarkeitsdatum/Chargen

• Message number: 139

• Message text: Enter a valid year

What causes this issue?

You have entered a date in a screen field to which a period indicator
is assigned. This period indicator contains the value = 'Year'. The
system therefore only allows you to enter a two-digit or four-digit
year number.
The value you entered is not a valid year.

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?

Enter a correct year number.

Error message extract from SAP system. Copyright SAP SE.

12139 - Details

• The SAP error message 12139, "Enter a valid year," typically occurs when a user is trying to input a year in a date field that is not recognized as valid by the system. This can happen in various contexts, such as when entering dates in transaction codes, reports, or configuration settings.
  Causes:
  
  Invalid Year Format: The year entered may not conform to the expected format (e.g., entering a two-digit year instead of a four-digit year).
  Out of Range Year: The year entered may be outside the acceptable range defined in the system settings (e.g., years before 1900 or after 2100).
  Incorrect Data Entry: A simple typographical error could lead to an invalid year being entered.
  System Configuration: The system may have specific configurations that limit the range of acceptable years.
  
  Solutions:
  
  Check Year Format: Ensure that the year is entered in the correct format (usually four digits, e.g., 2023).
  Verify Year Range: Make sure the year falls within