Switch login usernames changed after S/W update

[C-J]

When upgrading the software on a J8698a 5412zl switch from 15.4.7 to 15.7.8 the account names were reset from what their custom assigned names to "manager" and "operator".  Kept the same password.  Just thought someone might want to know as there was no mention of this sort of thing in the docs.

[C-J]

Ok, I had a lot of switches to do and it would appear that if no manage username exists it gives it the name "manager"  If one exists, it keeps that name but also gives it an alternative name
"manager" which I have not been able to figure out how to remove.  I don't think I am alone in disliking leaving full access default account names on networking equipment.  Anyone know how to remove the default account names from Procurve switches?