Failed to delete disk pool dp_disk_xxxdd1

Hi All;

My NBU: master is running on window 2008 R2 nbu 7.7.2, meia server is netbackup appliance 5230. I am going to decom that netbackup appliance. I removed all SLP & STU related to that appliance but I am not able to remove diskpool. I got error message " Failed to delete disk pool dp_disk_xxxdd1: unable to process request because the server resources are busy (134) . Diskpool cannot be deleted because it contains volumes referenced by an SLP replication target (xxx_to_xxx_DD1_60_days) (MM Status 134).

I ran nbstlutil list -lifecycle xxx_to_xxx_DD1_60_days -U but it doesn't show anything

D:\Program Files\Veritas\NetBackup\bin\admincmd>nbstlutil list -lifecycle xxx_to_xxx_60_days -U

No images or lifecycles matching criteria found.

Anyone knows how to fix that ? Thank you.

Tom