How To Fix AD340 - Field definitions for table & changed, data exists (F1)

SAP Error Message - Details

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 340

• Message text: Field definitions for table & changed, data exists (F1)

What causes this issue?

You have changed the definition of fields of the table in the ABAP/4
Dictionary. However, a physical table containing data has already been
created in the database for this table. To ensure system consistency,
you must adjust the definition of the database table 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, select
the <LS>Convert</> function in the utility for database tables. The
data in the table is kept when you convert the table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD340 - Field definitions for table & changed, data exists (F1) ?

  The SAP error message AD340 indicates that there is a mismatch between the field definitions of a table and the data that currently exists in that table. This typically occurs when changes have been made to the structure of a database table (such as adding or removing fields) but the existing data does not conform to the new structure.
  
  Cause:
  
  Table Structure Change: The most common cause is that the structure of the table has been modified (e.g., fields added, removed, or changed) after data has already been entered into the table.
  Inconsistent Data: The existing data in the table may not comply with the new field definitions, leading to inconsistencies.
  Transport Issues: If changes were transported from one system to another (e.g., from development to production), and the data was not properly adjusted, this error can occur.
  
  
  Solution:
  
  Check Table Structure: Review the current structure of the table in the Data Dictionary (SE11) to understand