Forum OpenACS Q&A: Problem with the drop scripts

Hi all i am using openACS 5.14 i have a problem when i am trying to uninstall the packages..it's not only with my own packages but also with openacs default packages such as forums or news....etc. it's giving me error such as

Database operation "0or1row" failed (exception NSDB, "Query was not a statement returning rows.")

ERROR: update or delete on "acs_objects" violates foreign key constraint "acs_objects_context_id_fk" on "acs_objects"
DETAIL: Key (object_id)=(908) is still referenced from table "acs_objects".

SQL:
select apm_package__delete('908');

Is it a bug with openACS 5.14 can any one help me with this please.