Morrell, 24, signed for the Hatters from Bristol City in October last year and after making his debut in the home defeat against Stoke two days later, went on to make a further 10 appearances.
The Welsh international will now reunite with his former Lincoln City manager Danny Cowley, whom he worked under in a loan spell during the 2019-20 season.
We would like to place on record our thanks to Joe for his contribution to the club and wish him well for the future.
Tags