I have tried altering the start with value of an Oracle sequence but I face
[ORA-02283: cannot alter starting sequence number] error.

I tried to find why Oracle does not allow the same but I could not find an appropriate answer for that.
So my question is why is it that Oracle does not let you change a sequence start with value?

(PS: I am hoping there should be a really solid technical reason behind this)

Thanks in advance!

create sequence s;

select s.nextval from dual;

NEXTVAL   
         1 

alter sequence s
  restart start with 10;
  
select s.nextval from dual;

NEXTVAL   
        10