Inception date vs. Creation date in GIPS

Being not a native speaker, could someone explain the difference between inception and creation dates?
“Composite Creation Date 
Firms must disclose the creation date of the composite, which is the date when the firm 
first groups one or more portfolios to create a composite. The composite creation date is 
not necessarily the same as the composite inception date (the initial date of the 
composite’s performance record). ”
 
Thanks