How To Fix FSCY138 - Changing substring &1 is not possible; master data exists

FSCY138 - Overview

• Message type: E = Error

• Message class: FSCY - Generation of Cover Pools - Flexible Master Data Structure

• Message number: 138

• Message text: Changing substring &1 is not possible; master data exists

What causes this issue?

You want to change the length of the substring &V1&, but this is not
possible because master data has been created using this substring or
the substring still contains entries.
If the master data subdivision is active, you cannot change the length
or the position of the substring for a subdivision ID if master data
that was created using this subdivision ID still exists. If there are
still entries, you can simply change the position in the master data.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message FSCY138 - Changing substring &1 is not possible; master data exists ?

  The SAP error message FSCY138, which states "Changing substring &1 is not possible; master data exists," typically occurs when you attempt to change a substring of a master data record in SAP, but the system prevents this action because there are existing dependencies or references to that master data.
  
  Cause:
  
  Existing Master Data: The substring you are trying to change is part of a master data record that is already in use. This could be due to existing transactions, configurations, or other dependencies that rely on the current value of that substring.
  Data Integrity: SAP enforces data integrity rules to ensure that changes do not lead to inconsistencies in the system. If a substring is linked to other records, changing it could disrupt those links.
  
  
  Solution:
  
  Check Dependencies: Before making changes, check if there are any existing transactions or records that depend on the substring you want to change. You may need to review related