Error in FPG4

I am testing one end to end scenario for Subscription billing process.

I followed these steps:

1.      I have created sale order in JK01

2.      I have created offer document in JKRM

3.      I have created payment lot in FP05

4.      I have created FICA document in JFTA

5.      I have done mass clearing in FPMA

6.      I have closed reconciliation key FPG4 (here i am getting below error. Please refer screenshot for the same)

7.      Transfer closed reconciliation keys to FI in FPG1 ( due to previous step not successful, not able to do this step)

error is: under status of reconciliation key "RESERVED" is coming with RED symbols.

Request you to help me to complete this process. Looking forward to hearing from you.

Thanks,

Muneendra