Pension Summary and National Insurance Record Years Paid difference

Hi I checked my pension summary and it told me I had six years paid. As I am considering paying the voluntary contributions to bring me to 10 years I clicked on the view the gap years. Looking at my National Insurance Record it looks like I only have 3 full years paid. How do I know which is correct?

Hi,
For confirmation of how many qualifying years you have and how many you need to pay to give you 10 Qualifying years, please contact Future Pension Centre. Please find their contact details below:
Number
0800 731 0175
Overseas
+44 191 218 3600
Open
8.00am to 6.00pm Monday to Friday
If you are unable to get through to future pension centre due to the high volume of calls you can complete a call back request form. Please find below:
Request a call back to pay voluntary National Insurance contributions
Thank you.