How To Fix AD294 - Foreign key &-& (foreign key was deleted)

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 294

• Message text: Foreign key &-& (foreign key was deleted)

What causes this issue?

A foreign key which previously existed is deleted. This can have the
following reasons.
The key of the value table was changed structurally, i.e. the positions
and/or the number of key fields changed (type or length changes without
changing the position or the number of key fields do not cause foreign
keys to be deleted).
The value table was removed from the domain of the check field.
Another domain was entered for the data element of the check field.
The foreign key was purposely deleted from the ABAP/4 Dictionary.

How to fix this error?

If the foreign key was automatically deleted and you do not want this,
then you will have to create the foreign key again.
It might be necessary to adjust the field definitions of the dependent
table to the new value table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD294 - Foreign key &-& (foreign key was deleted) ?

  The SAP error message AD294 indicates that a foreign key constraint has been violated because the foreign key that was expected to exist has been deleted. This typically occurs in the context of database operations where a relationship between two tables is defined, and one of the tables has had its foreign key relationship removed.
  Cause:
  
  Foreign Key Deletion: The foreign key constraint that was supposed to link two tables has been deleted. This can happen due to changes in the database schema, such as manual deletions or modifications made by a developer or database administrator.
  Data Integrity Issues: If the foreign key was deleted without properly handling the related data, it can lead to inconsistencies in the database.
  Configuration Changes: Changes in the configuration of the application or database that affect how data is related can also lead to this error.
  
  Solution:
  
  
  Recreate the Foreign Key: If the foreign key was deleted unintentionally, you can recreate it. This can be done through the SAP Data Dictionary (transaction SE11) or through SQL commands if you have access to the database.
  
  Go to SE11, select the table that should have the foreign key, and add the foreign key relationship back.
  
  
  
  Check for Data Integrity: Ensure that the data in the tables is consistent. If there are orphaned records (records that reference a non-existent parent record), you may need to clean up the data before recreating the foreign key.
  
  
  Review Changes: If the deletion was part of a planned change, review the changes to ensure that they align with the overall data model and that all necessary adjustments have been made.
  
  
  Consult Documentation: If you are unsure about the foreign key relationships, consult the documentation or data model for the application to understand the intended relationships between tables.
  
  
  Error Handling: Implement error handling in your application to gracefully manage situations where foreign key constraints are violated.
  
  
  Related Information:
  
  Foreign Key Constraints: These are rules that maintain referential integrity between two tables. They ensure that a record in one table cannot exist without a corresponding record in another table.
  SAP Transactions: Familiarize yourself with relevant SAP transactions such as SE11 (Data Dictionary), SE14 (Database Utility), and SE37 (Function Module) for managing database objects and constraints.
  Database Administration: If you have access to the underlying database, you may also want to check the database logs or use database management tools to investigate the issue further.
  
  If the problem persists after attempting these solutions, it may be beneficial to consult with a database administrator or SAP support for further assistance.