How To Fix DT820 - & occurs as & in the non-key section of the table

DT820 - Overview

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 820

• Message text: & occurs as & in the non-key section of the table

What causes this issue?

In the customer version of the table, the include is located in the key
section. In the SAP version, on the other hand, it is in the non-key
section.

System Response

The include is transferred to the non-key section of the table.

How to fix this error?

Reducing the key in this way carries the risk of table entries being
lost. However, if the field in question is converted back to the key
field, there is a danger that SAP applications will no longer work or
will not function correctly.
If the field in question is the check field of a foreign key
relationship, this will be deleted.
Check the situation carefully and, if necessary, modify the table.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT820 - & occurs as & in the non-key section of the table ?

  The SAP error message DT820 typically indicates an issue related to the data dictionary, specifically concerning the definition of a table or structure in the ABAP Dictionary. The error message usually states that there is a problem with the non-key fields of a table, which can occur for various reasons.
  Cause of Error DT820
  
  Field Definition Issues: The non-key fields in the table may not be defined correctly. This could include incorrect data types, lengths, or other attributes that do not conform to the expected standards.
  Inconsistent Data Types: If the non-key fields are defined with inconsistent data types or lengths compared to other related tables or structures, this error can occur.
  Missing Field Attributes: Required attributes for non-key fields may be missing, such as field labels or documentation.
  Table Locking Issues: Sometimes, if the table is locked or being modified by another user or process, it can lead to this error.
  
  Solution
  
  Check Field Definitions: Review