How To Fix AD341 - Key to table & changed, data exists (F1)

AD341 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 341

• Message text: Key to table & changed, data exists (F1)

What causes this issue?

You have changed the key to the table in the ABAP/4 Dictionary.
However, a physical table containing data already exists in the
database for this table. To ensure system consistency, the definition
of the database table must be adjusted to correspond to the logical
table definition in the ABAP/4 Dictionary.

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?

Convert the table using the database utility (SE14). To do this,
selection the <LS>Convert</> function in the utility for database
tables. The data in the table is kept when the table is converted.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD341 - Key to table & changed, data exists (F1) ?

  The SAP error message AD341 ("Key to table & changed, data exists") typically occurs when there is an attempt to change a key field in a table where data already exists. This error is common in scenarios where you are trying to modify a primary key or a unique key field in a database table that has existing entries.
  
  Cause:
  
  Key Field Modification: You are trying to change a field that is part of the primary key or a unique index in a table that already contains data.
  Data Integrity: SAP enforces data integrity rules, and changing key fields can lead to inconsistencies in the database.
  Foreign Key Dependencies: There may be foreign key relationships that depend on the key you are trying to change.
  
  
  Solution:
  
  Check Data Dependencies: Before making changes, check if there are any existing records that depend on the key you are trying to modify. You may need to delete or update