Hi, the Logs backups are failing with ACO5422E error, here is the TSM log for this.
First i ran a full backup for all the DB.
I can't understand why are they failing even after i ran a full backup.

Beginning log backup for database QS1, 3 of 3.
Full: 0 Read: 0 Written: 0 Rate: 0.00 Kb/Sec

Backup of QS1 failed.
ACO5422E Received the following from the MS SQL server:
An exception occurred while executing a Transact-SQL statement or batch.
BACKUP LOG cannot be performed because there is no current database backup.

BACKUP LOG is terminating abnormally.

Changed database context to 'master'. (HRESULT:0x801315