Morrison, 22, is the second player to leave the Holy Blues in as many days, with Joe Maguire also departing.
"I’d like to thank Curtis Morrison for all his hard work and efforts since my arrival ten weeks ago," said manager Curtis Woodhouse.
"Curtis has scored some important goals and had some good games for us but I felt moving forward his game time would be limited and in the best interests of both parties Curt should move on to find regular football. I’m sure he will pretty soon."
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