GIPS Question Using CVG GIPS understand, additional, subsequent

mp3bu

I understand you can use CVG GIPS pre2006 data, the paragraph also says how you must include that performance data in subsequent GIPScompliant presentations until a minimum of ten years of performance is presented.
Does this mean you need to include CVG data until you have 10 years of “compliant” data, or can you phase it out over time? (i.e. if you have 5 years CVG and you finally record an additional 6 years of compliant data, you can get rid of ONE of the years of CVG data).
Thanks in advance.