Take a look at which players are affected...
7. Sullay Kaikai
The club hold the option to extend the winger's deal by 12 months
8. Gary Madine
The striker has just returned from a lengthy injury
9. Stuart Moore
The backup goalkeeper arrived on a short-term deal in February
10. Jack Sims
The young shot stopper made two appearances in the EFL Trophy
11. Nathan Shaw
The club hold the option to extend the winger's deal by 12 months
12. Ollie Turton
The right-back is the club's longest-serving player