Release simulation is coming with wrong codes

Dear EXPERTS ,

recently We transfer release strategies from quality to production server .after transferring strategies ,

for one release strategies and group combination , two release codes is there ex : p0,p1

and prerequisites and characteristic assignment showing is perfectly showing .

but when i do release simulation (set/Reset) ,system showing here p0 p3 p1

it's showing three codes . what is the problem i am not understand .

In PO also it's showing , three release codes .

give me solution how to remove this release code p3 .

Thank &Regards,

ravi.