HA Sync failed issue

When I tried to sync from my active device to the stand by I got the below error.

 

StatusSync Failed SummaryA validation error occurred while syncing to a remote device Details Sync error on xxx.rol.mgnt.local: Load failed from xxx.rol.mgnt.local 01070313:3: Error reading key PEM file /config/filestore/files_d/Common_d/certificate_key_d/:Common:xxx-2.key_61863_1 for profile xxx: error:0907B00D:lib(9):func(123):reason(13) Recommended action: Review the error message and determine corrective action on the device

 

Please help me on this.