Error 0xC800020B

Value: -939523573 | 0xC800020B | 3355443723

What does it mean ?

hrBackupNotAllowedYet  
Unable to perform a backup now.
Value: 523 | 0x020B | 0b0000001000001011

Where does it come from ?

FACILITY_NTDSB  
Active Directory Domain Services
Value: 2048 | 0x800 | 0b100000000000

Other Errors for FACILITY_NTDSB