Sackey-Mensah, 22, recently joined the Magpies in July 2022 from Loughborough University FC.
The young defender featured in Dereham Town's 4-0 pre-season defeat against Norwich.
After one month at the club, Sackey-Mensah has decided to cancel his contract with the Magpies citing travel commitments as a key factor in his decision to leave.
He will join fellow Midlands club St Neots Town for the 2022/23 season and will be available to play in their FA Cup tie against Walsham-le-Willows FC on Friday.
Beginning his career in Norwich's youth system, Sackey-Mensah featured for Stevenage U18's and enjoyed a loan spell at Welwyn Garden City FC.
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