Error: 61705, Level 19, State 1, Line 0 - LiteSpeed could not create the virtual device for datab (4264654)

When running multiple backup operations using LiteSpeed, if the same GUID is specified for more than one backup operation (in the t-sql script) the subsequent backup will fail with the following error message:

Msg 61705, Level 19, State 1, Line 0
LiteSpeed could not create the virtual device for database (database_name).
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An identical GUID is being specified in the backup task or Maintenance Plan script by the user.

The GUID is normally generated in the background by the LiteSpeed engine or the backup wizard and is used to identify that specific job to the SQL VDI. This process works fine unless a script is produced by the LiteSpeed backup wizard. In that script the GUID is specified as a parameter of the LiteSpeed stored procedure, ie. @GUID = N'AA1B3530-74A2-32EB-AB0F-0B942B076DFE'

The error message will display if a scripted task is Copy/Pasted or replicated without removing or amending the @GUID parameter for the second and subsequent tasks in the script. This causes conflict with the SQL VDI if two different scripted tasks attempting to use the same GUID at the same time

WORKAROUND:
Remove the @GUID parameters from scripted tasks which are copied from the Backup wizard.

A Change Request (CR64,435) has been submitted to remove the @GUID parameter from the output script in a future version of LiteSpeed. This will prevent duplication of the @GUID parameter when scripts are subsequently re-used (or run simultaneously).