Oracle ASM disk corruption

The following data was captured from V$ASM_DISK but it is consistent on all nodes if queried from GV$ASM_DISK:

                                                 OS disk Space   Space              Disk
           Mount   Header       Mode    Disk     Size    Total   Free    ASM Disk   Failgroup                                 Vote
Grp# Disk# Status  Status       Status  State    (MB)    (MB)    (MB)    Name       Name       Disk path                      file


---- ----- ------- ------------ ------- -------- ------- ------- ------- ---------- ---------- ------------------------------ ----


   0     0 CLOSED  MEMBER       ONLINE  NORMAL    20,490       0       0                       /dev/oracleasm/grid/asmgrid01  Y
   2     0 CACHED  MEMBER       ONLINE  NORMAL    20,490  20,480   9,987 GRID_0000  GRID_0000  /dev/oracleasm/grid/asmgrid03  Y
   2     1 CACHED  MEMBER       ONLINE  NORMAL    20,490  20,480   9,987 GRID_0001  GRID_0001  /dev/oracleasm/grid/asmgrid02  Y

The disk that is not showing up is GRID_0002 and the block device name is /dev/oracleasm/grid/asmgrid01. The only change that has been made recently was that the OS on all three nodes was upgraded from RHEL6 to RHEL7. I have tried to drop this disk from the DG but that didn't work and I got the message that this disk is not part of the GRID DG.

What is the best way to resolve this issue? Should I overwrite the header of this device using dd so that it becomes a candidate disk? Any help will be appreciated.

Thank you,
Amir