Disable the option called "Optimize Object Level Recovery speed" on the UI
or
Change the T-SQL to OLRMAP =0
Please disable the option from the Backup Template, and redeploy the job if it's running from Backup Template.
This issue will be addressed in LiteSpeed 8.8 by disabling this option by default.
Notes: By disabling the option "Optimize Object Level Recovery speed"; OLR feature still works but it just doesn't create an index during the backup process.