Error 0x8024801B

Value: -2145091557 | 0x8024801B | 2149875739

What does it mean ?

WU_E_DS_SCHEMAMISMATCH  
The schema of the current data store and the schema of a table in a backup XML document do not match.
Value: 32795 | 0x801B | 0b1000000000011011

Where does it come from ?

FACILITY_WINDOWSUPDATE  
Windows update
Value: 36 | 0x024 | 0b00100100

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