How To Fix /PLMU/UI_LBL021 - Cannot deselect a composition item if parent &1 is selected

SAP Error Message - Details

• Message type: E = Error

• Message class: /PLMU/UI_LBL -

• Message number: 021

• Message text: Cannot deselect a composition item if parent &1 is selected

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /PLMU/UI_LBL021 - Cannot deselect a composition item if parent &1 is selected ?

  The SAP error message /PLMU/UI_LBL021 indicates that you are trying to deselect a composition item while its parent item is still selected. This typically occurs in scenarios where there is a hierarchical relationship between items, such as in product configurations or bill of materials (BOM) where certain components are dependent on their parent items.
  
  Cause:
  The error arises because the system enforces a rule that prevents the deselection of a child item (composition item) if its parent item is still selected. This is to maintain the integrity of the data and ensure that the relationships between items are respected.
  
  Solution:
  To resolve this error, you need to follow these steps:
  
  
  Deselect the Parent Item: Before you can deselect the composition item, you must first deselect its parent item. This will allow you to modify the selection of the child items.
  
  
  Check Dependencies: Review the dependencies and relationships between the items. Ensure that you understand which items