How To Fix DT106 - Append structure & is used in more than one table:

DT106 - Overview

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 106

• Message text: Append structure & is used in more than one table:

What causes this issue?

An append structure may only be assigned to one table. This condition
has been violated.

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?

An append structure can only ever be used in one table. If you have to
append the same fields to several tables, you should store these fields
in a structure.
Then create an append structure for each table to which you wish to add
fields and, in each case, include the structure in the relevant append.

Error message extract from SAP system. Copyright SAP SE.

DT106 - Details

• The SAP error message DT106 indicates that an append structure is being used in more than one table, which is not allowed in the context of certain operations, such as when trying to activate or transport the append structure. This error typically arises during the development or modification of database tables and structures in the ABAP Dictionary.
  
  Cause:
  
  Multiple Usage: The append structure has been assigned to more than one database table. In SAP, an append structure can only be associated with a single table to maintain data integrity and consistency.
  Transport Issues: If the append structure is included in a transport request and is being transported to a system where it is already used in another table, this can trigger the error.
  Development Environment: The error may also occur if there are inconsistencies in the development environment, such as multiple developers working on the same append structure or table.
  
  
  Solution:
  
  Check Usage: Identify all the