2030146 - Error message DT189 "Current enhancement category is incorrect"

Performing a "Syntax Check" on a program leads to warning saying that the enhancement specification of the structure type "XXXXX" is not consistent.

For example:

Or, if a check or activation is performed on a dictionary object in SE11, error message DT189 "Current enhancement category ... is incorrect" is raised :

All NetWeaver base ABAP systems

DT189, Current enhancement category is incorrect, The following enhancement categories can be selected, enhancement category, SE11, SE38, Syntax check, enhancement specification, Can Be Enhanced, not consistent, current enhancement category can be enhanced, inconsistent in active version , KBA , BC-DWB-DIC-ED , Data Dictionary Tools in ABAP Workbench , Problem