How To Fix DO848 - Row type not allowed as key (table type is row type)

DO848 - Overview

• Message type: E = Error

• Message class: DO - Dictionary: Mass activation of domains and data elements

• Message number: 848

• Message text: Row type not allowed as key (table type is row type)

What causes this issue?

Only the standard key and unspecified settings are allowed as
<DS:TX.DDDOC_KEYDEF>key</> for a table type having a different table
type as <DS:TX.DDDOC_ROWTYPE>row type</>.
You chose row type as key.

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?

Choose a valid key as table type or choose a different row type.

Error message extract from SAP system. Copyright SAP SE.

DO848 - Details

• The SAP error message DO848 ("Row type not allowed as key (table type is row type)") typically occurs when you are trying to use a row type as a key in a table type that is defined as a row type. This error is related to the way that SAP handles data structures in ABAP (Advanced Business Application Programming).
  
  Cause:
  
  Row Type vs. Table Type: In ABAP, a row type is a single record structure, while a table type is a collection of records. If you attempt to use a row type as a key for a table type that is defined as a row type, SAP will throw this error because it expects a different structure for the key.
  Incorrect Data Declaration: The error can also arise from incorrect data declarations in your ABAP code, where you might be trying to use a row type in a context that requires a table