How To Fix AD858 - Field & (Value & = & not allowed)

AD858 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 858

• Message text: Field & (Value & = & not allowed)

What causes this issue?

The specified field contains an invalid entry.

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?

Check the entries in the specified field. If the table is one that has
been generated automatically (for example, the pooled table of a
matchcode ID), check whether any errors occurred in the generation
process.

Error message extract from SAP system. Copyright SAP SE.

AD858 - Details

• The SAP error message AD858 ("Field & (Value & = & not allowed)") typically indicates that a certain field in your SAP system is being populated with a value that is not permitted according to the system's validation rules. This error often arises in the context of data entry or during the execution of a transaction where specific field values are restricted.
  
  Cause:
  
  
  Invalid Value: The value being entered in the specified field does not meet the criteria defined in the system. This could be due to:
  
  The value being outside an acceptable range.
  The value not being part of a predefined list of acceptable values (e.g., a dropdown list).
  The value being in an incorrect format (e.g., entering text in a numeric field).
  
  
  
  Field Configuration: The field may have specific configuration settings that restrict certain values based on business rules or logic defined in the system.
  
  
  Authorization Issues: Sometimes, the error can also be related to