I want to upgrade customer instance from Tokyo Family Release to Vancouver release.

[Harish KM]

Hi @srinivask here are the links for successful upgrade from servicenow

https://www.servicenow.com/content/dam/servicenow-assets/public/en-us/doc-type/success/workbook/upgr...

https://www.servicenow.com/content/dam/servicenow-assets/public/en-us/doc-type/success/quick-answer/...