Changing the setting 'Enter the default number of days before the renewal date to generate invoice for domain renewals below:'

[slim]

I would like to change the setting as circled in red in the screenshot.

I want to change it from 14 to something longer..However many years ago I changed this setting from 7 -> 14 days and it resulted in a lot of domains getting two invoices. I would like to avoid this. I also want to change the 21 days to 31 days in the Semi-Annually, Annually, Biannially and Triennially sections - But again, cannot afford to have double ups of invoices.

Can someone confirm if changing this setting is going to cause these double ups of invoices?