Program name and approval year have to be unique

What causes this issue?

At the present time, it is possible to maintain <ZH>only one</>
investment program in the enterprise organization. Therefore, you have
to specify the investment program you want to display, before you you
start editing. You specify the investment program in the selection
dialog box, by entering a unique combination of program name and
approval year.
Currently, you did not enter a value for one of these parameters, or
you entered a search string for it. Using these parameters, it is not
guaranteed that the system can limit the data selection to just one
investment program.

System Response

The entry is rejected.

How to fix this error?

Enter values that specify a unique investment program. Do not use
search strings.

Error message extract from SAP system. Copyright SAP SE.