Symptom:

When backing up a VM, a warning message similar to the one below appears when you right-click the active job and select "View Message Logs":
VMBackup: WARNING! - staging directory already exists! this could be indicative of a problem, proceeding by deleting current directory and recreating a new one...
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Cause:
This is working as designed.
This message indicates that a previous backup did not complete successfully and the old snapshot is still in the staging directory.
The CFA deletes the directory and snapshot and continues with the current backup. This may cause the backup for this VM to take a bit longer to complete.
*[AES]: Advanced Encryption Standard *[AESs]: Advanced Encryption Standards *[API]: application programming interface *[APIs]: application programming interfaces *[AWS]: Amazon Web Services *[AWSs]: Amazon Web Servicess *[BMR]: BareMetal Restore *[BMRs]: BareMetal Restores *[CAB]: Cloud Application Backup *[CABs]: Cloud Application Backups *[CB]: Cloud Backup *[CBs]: Cloud Backups *[CBT]: Changed Block Tracking *[CBTs]: Changed Block Trackings *[CFA]: cloud failover appliance *[CFAs]: cloud failover appliances *[CIFS]: Common Internet File System *[CIFSs]: Common Internet File Systems *[DC]: data center *[DCs]: data centers *[DDFS]: deduplication file system *[DDFSs]: deduplication file systems *[DDFS-AR]: DDFS-assisted replication *[DDFS-ARs]: DDFS-assisted replications *[DPS]: Data Protection Server *[DPSs]: Data Protection Servers *[DR]: disaster recovery *[DRs]: disaster recoverys *[DRaaS]: Disaster Recovery as a Service *[DRaaSs]: Disaster Recovery as a Services *[GCP]: Google Cloud Platform *[GCPs]: Google Cloud Platforms *[ICAB]: Infrascale Cloud Application Backup *[ICABs]: Infrascale Cloud Application Backups *[ICB]: Infrascale Cloud Backup *[ICBs]: Infrascale Cloud Backups *[ICMP]: Internet Control Message Protocol *[ICMPs]: Internet Control Message Protocols *[IDR]: Infrascale Disaster Recovery *[IDRs]: Infrascale Disaster Recoverys *[IPMI]: Intelligent Platform Management Interface *[IPMIs]: Intelligent Platform Management Interfaces *[JVM]: Java virtual machine *[JVMs]: Java virtual machines *[LVM]: logical volume management *[LVMs]: logical volume managements *[MFA]: multi-factor authentication *[MFAs]: multi-factor authentications *[MSP]: managed services provider *[MSPs]: managed services providers *[N/A]: Not applicable *[N/As]: Not applicables *[NAS]: network-attached storage *[NASs]: network-attached storages *[NAT]: network address translation *[NATs]: network address translations *[NFS]: Network File System *[NFSs]: Network File Systems *[NIC]: network interface controller *[NICs]: network interface controllers *[NTP]: Network Time Protocol *[NTPs]: Network Time Protocols *[NTPD]: Network Time Protocol Daemon *[NTPDs]: Network Time Protocol Daemons *[OBRM]: Online Backup and Recovery Manager *[OBRMs]: Online Backup and Recovery Managers *[ODX]: Offloaded Data Transfer *[ODXs]: Offloaded Data Transfers *[PBKDF2]: Password-Based Key Derivation Function 2 *[PBKDF2s]: Password-Based Key Derivation Function 2s *[POSIX]: Portable Operating System Interface for Unix *[POSIXs]: Portable Operating System Interface for Unixs *[RAID]: Redundant Array of Independent Disks *[RAIDs]: Redundant Array of Independent Diskss *[RCT]: resilient change tracking *[RCTs]: resilient change trackings *[ROM]: read-only memory *[ROMs]: read-only memorys *[SDK]: software development kit *[SDKs]: software development kits *[SMB]: Server Message Block *[SMBs]: Server Message Blocks *[SMTP]: Simple Mail Transfer Protocol *[SMTPs]: Simple Mail Transfer Protocols *[SNMP]: Simple Network Management Protocol *[SNMPs]: Simple Network Management Protocols *[UCAR]: unique content addressable repository *[UCARs]: unique content addressable repositorys *[UDP]: User Datagram Protocol *[UDPs]: User Datagram Protocols *[UEFI]: Unified Extensible Firmware Interface *[UEFIs]: Unified Extensible Firmware Interfaces *[UNC]: Universal Naming Convention *[UNCs]: Universal Naming Conventions *[vCFA]: virtual cloud failover appliance *[vCFAs]: virtual cloud failover appliances *[VM]: virtual machine *[VMs]: virtual machines *[VNC]: Virtual Network Computing *[VNCs]: Virtual Network Computings *[vNIC]: virtual network interface controller *[vNICs]: virtual network interface controllers *[VPN]: virtual private network *[VPNs]: virtual private networks *[VSS]: Volume Shadow Copy Service *[VSSs]: Volume Shadow Copy Services