Error 0xC004C021

Value: -1073430495 | 0xC004C021 | 3221536801

What does it mean ?

SL_E_CHPA_DMAK_EXTENSION_LIMIT_EXCEEDED  
The activation server reported that the Multiple Activation Key extension limit has been exceeded.
Value: 49185 | 0xC021 | 0b1100000000100001

Where does it come from ?

FACILITY_ITF  
COM/OLE Interface management. FACILITY_ITF is designated for user-defined error codes returned from interface methods
Value: 4 | 0x004 | 0b00000100

Other Errors for FACILITY_ITF