10000692 
Message
On "Stages" tab, start date must be later than or equal to start date in general area
Diagnosis
In the Sales Opportunity window, you have attempted to add a new sales opportunity. On the Stages tab, the start date is earlier than the start date in the General area.
Procedure
In the Sales Opportunity window, on the Stages tab, select a start date that is later than or equal to the start date in the General area.