cutover
/ˈkjuːoʊvər/Definitions
1. noun
a point in time when a system, process, or technology is switched from one to another, such as a change from an old to a new version or a switch from one database to another.
“The cutover to the new server will occur at midnight, so make sure all data is saved before then.”
2. verb
to switch from one system, process, or technology to another, especially in a way that minimizes disruption.
“The company plans to cutover to a new customer relationship management system next quarter.”