SAP Message UCFE883 - Value &1 of the predef.structure conflicts with the breakdown of item &2

Diagnosis
The breakdown category of item &V2& has a required breakdown forsubassignment &V3&. It also forces the value entry and does not permitthe default value.
The default value is &V4&. However, the default value &V4& isprescribed for &V3& in the definition of the data entry layout.

Procedure
Check the definition of the data entry layout and change it ifnecessary.