Not able to Recreate Cost Plan Breakdowns for Cost Plan.
This was happening due to improper Fiscal Period records.
1. Navigate to Fiscal Calendar > Fiscal Periods
2. Make sure the Dates are proper and if not fix them
3. Go to the related Resource Plan record
4. Change the Planned End Date to be in a different month
5. Change the Planned End Date back to what it should be. This will allow the necessary scripts to regenerate the Cost Plan Breakdowns for the Cost Plan.