Hello.
I am sorry,but what you did just unfair!
For example my team was drawn against the team from third division.
Now because of your mistake and new draw I got the team from first division,ranked number one in the country.
What you should had to do it redrawn ONLY the teams that YOU forgot to include in the next round,and not redrawn
ALL the teams.
I hope that a lot of managers can agree with me in this one,and you should keep the old draw for the teams that already had they teams in the next round,and redrawn only the teams who was not included.