How To Fix CL551 - Assignment & & cannot be deleted

SAP Error Message - Details

• Message type: E = Error

• Message class: CL - Classification

• Message number: 551

• Message text: Assignment & & cannot be deleted

What causes this issue?

The following causes may apply:
Material &V1& is a component in a BOM. In the item data of this BOM
component, you have entered the class type which is used to classify the
material.
You can enter the class type of a BOM component if you want to use the
classification data of a material as a selection condition in
<DS:GLOS.variant_configuration>variant configuration</>.
Material &V1& is a batch material and is classified in a batch class
type. Either there are still related batches that are classified, or the
material has a product unit of measure (material master).

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?

You cannot delete the classification data:
If you want to use the classification data of the material to select BOM
components
If the material still has batches that are classified.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CL551 - Assignment & & cannot be deleted ?

  The SAP error message CL551, which states "Assignment & & cannot be deleted," typically occurs in the context of Class Management in SAP. This error indicates that there is an issue with trying to delete an assignment of a class or an object that is still being referenced or is in use.
  Causes:
  
  Active References: The class or object you are trying to delete has active references in other objects, such as characteristics, objects, or subclasses.
  Dependencies: There may be dependencies that prevent the deletion of the assignment. For example, if the class is being used in a material master or in a BOM (Bill of Materials), it cannot be deleted.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to delete the assignment.
  System Lock: The object might be locked by another user or process, preventing deletion.
  
  Solutions:
  
  Check References: Use transaction codes like CL02 (Change Class) or CL03 (Display Class) to check if there are any active references to the class or object you are trying to delete. You can also use transaction SE11 to check for database table references.
  Remove Dependencies: If there are dependencies, you will need to remove or change them before you can delete the assignment. This may involve changing the material master, BOM, or other related objects.
  Authorization Check: Ensure that you have the necessary authorizations to perform the deletion. You may need to contact your SAP security team if you suspect authorization issues.
  Unlock Objects: If the object is locked, you can check the lock entries using transaction SM12 and unlock it if necessary (ensure you have the right to do so).
  Consult Documentation: Review SAP documentation or notes related to the specific class or object for any additional steps or considerations.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CL01 (Create Class), CL02 (Change Class), CL03 (Display Class), and CL24 (Display Class Hierarchy).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Support: If the issue persists, consider reaching out to SAP support or your internal SAP support team for further assistance.
  
  By following these steps, you should be able to identify the cause of the CL551 error and take appropriate action to resolve it.