How To Fix WB2_ASGT156 - TC &1: Supplier cannot be changed. Items have predecessor or successors.

WB2_ASGT156 - Overview

• Message type: E = Error

• Message class: WB2_ASGT - Shadow items ans assignments

• Message number: 156

• Message text: TC &1: Supplier cannot be changed. Items have predecessor or successors.

Self-Explanatory Message

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WB2_ASGT156 - Details

• The SAP error message WB2_ASGT156 indicates that a supplier cannot be changed for a specific transaction because there are items that have predecessor or successor relationships. This typically occurs in the context of procurement or inventory management where items are linked in a way that affects their processing.
  
  Cause:
  
  Predecessor/Successor Relationships: The items in question are part of a chain where one item (the predecessor) must be completed or processed before another item (the successor) can be handled. Changing the supplier for these items can disrupt this chain.
  Data Integrity: SAP enforces data integrity rules to ensure that changes do not lead to inconsistencies in the procurement or inventory processes.
  
  
  Solution:
  
  Review Item Relationships: Check the predecessor and successor relationships for the items involved. You may need to analyze the item master data or the specific transaction to understand how they are linked.
  Change Supplier for Individual Items: If possible, consider changing the supplier for individual