Values in Search Help

When I try to search the possible values in the drop-down for a field in Infotype 001 (Pers Area), I get a message that says "No values exist". In all the other fields the drop-downs contain the list of possible entries.

It is only in this one field and only for one person. Other users do get the correct drop-down, and this person gets drop-downs on the other fields such as Pers Subarea, Cost Centre, etc. Nothing changed wrt his authorization or wrt to the list of Pers Areas. The same applies to other Infotypes and reports - just the field Pers Area returns the message of "No values exist" at the bottom of the screen

It is possible that a personal list was created in this search help, but now no values are returned and there is no way to get back to the original list.

Please assist