Error 0x80045069

Value: -2147200919 | 0x80045069 | 2147766377

What does it mean ?

SPERR_ROOTRULE_ALREADY_DEFINED  
There is already a root rule for this grammar Defining another root rule will fail.
Value: 20585 | 0x5069 | 0b0101000001101001

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

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