How To Fix AQ150 - The field & has already been assigned to table &

AQ150 - Overview

• Message type: E = Error

• Message class: AQ - Message texts for SAP Query

• Message number: 150

• Message text: The field & has already been assigned to table &

What causes this issue?

You attempted to maintain an additional field, which has already been
defined, but chose a different assignment to a logical database table
than that in the original definition of the additional field.

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?

If you want to change the additional field definition without changing
the database table assignment, specify the correct database table.
If you want to assign the additional field to a different database
table, you must first delete the additional field en then redefine it.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AQ150 - The field & has already been assigned to table & ?

  The SAP error message AQ150, which states "The field & has already been assigned to table &," typically occurs during the process of defining or modifying database tables or structures in the Data Dictionary (SE11) or when working with ABAP Dictionary objects. This error indicates that the field you are trying to assign to a table is already associated with another table or structure.
  
  Cause:
  
  Field Already Assigned: The field you are trying to add to a table is already defined in another table or structure. In SAP, fields must be unique within the context of a table or structure.
  Duplicate Definition: There may be an attempt to create a duplicate field definition in the Data Dictionary.
  Incorrect Table/Field Reference: The field might be referenced incorrectly, leading to confusion in the assignment.
  
  
  Solution:
  
  Check Field Assignment: Verify if the field is already assigned to another table or structure. You can do this by checking the Data