How To Fix AD435 - Client field & is not in first field position, table is cross-client

AD435 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 435

• Message text: Client field & is not in first field position, table is cross-client

What causes this issue?

With a client-specific table, the SAP System expects the field which
describes the client to be in the first position. The leading key
position of the client field restores the hierarchical dependency of
the data on the client.
If the client field is not set in the first position of the table
definition, selection of such small datasets leads to a comprehensive
table scan, which has a considerable effect on performance.

System Response

If the client field is, nevertheless, not specified in the first key
position, the table is activated but is <LS>not</> identified as
client-specific by the ABAP/4 Dictionary, i.e. you do not have any
SELECT support for this table in ABAP as with client-specific tables
(the client is thus not automatically ascribed).
WHAT_TO_DO&

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD435 - Client field & is not in first field position, table is cross-client ?

  The SAP error message AD435 indicates that there is an issue with the client field in a cross-client table. Specifically, it means that the client field (usually the field that represents the client in the SAP system, typically "MANDT") is not in the first field position of the table definition. This is a requirement for cross-client tables in SAP.
  
  Cause:
  
  Field Positioning: In SAP, cross-client tables must have the client field (MANDT) as the first field in the table definition. If it is not, the system will throw the AD435 error.
  Table Definition: The error often arises when a developer or administrator modifies the table structure and inadvertently moves the client field from its required position.
  
  
  Solution:
  
  
  Check Table Definition: 
  
  Go to the Data Dictionary (transaction SE11).
  Enter the name of the table that is causing the error.
  Check the field order in the table definition. Ensure that the client field (MANDT) is the first field listed.
  
  
  
  Modify