how i insert churned rows seer method value?

i know i insert churned rows controlling unparalleled statement, i syntax .

however, values i am inserting taken sequence, i.e.

insert table_name
(col1,col2)
select my_seq.nextval,'some value' dual
union all
select my_seq.nextval,'another value' dual
;

if i try run it, i an ora-02287 error. there any proceed around this, should i only lot insert statements?

edit:

if i have mention buttress names columns sequence, i remove uncanny brevity, it's only value it. box i'll only churned insert statements.