How To Fix TG450 - Table & is losing customer fields, although it did not appear in SPDD

SAP Error Message - Details

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 450

• Message text: Table & is losing customer fields, although it did not appear in SPDD

What causes this issue?

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

INCLUDE 'DDFD_DEL' OBJECT DOKU ID TX
The specified table was not recognized as user-modified by the object
filter of transaction SPDD. Probably fields were inserted without
setting the repair flag for the table.

System Response

During the conversion, the data contained in these fields is lost.

How to fix this error?

INCLUDE 'DDFD_SOLUTION' OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.