The vacant featherweight championship will be on the line in July when Marcin Wrzosek and Kleber Koike Erbst face-off yet again at KSW 44.
KSW announced the bout on Monday.
The pair first met last year at the historic KSW 39 event and in front of 57,766 fans in Poland. It was Erbst who walked away with the belt around his waist following a decision victory.
However, in what was scheduled to be his first defense in December, Erbst missed weight thus relinquishing the belt.