Error 0x80110459

Value: -2146368423 | 0x80110459 | 2148598873

What does it mean ?

COMADMIN_E_CAT_PARTITION_IN_USE  
The partition cannot be deleted because it is the default partition for one or more users
Value: 1113 | 0x0459 | 0b0000010001011001

Where does it come from ?

FACILITY_COMPLUS  
COM+
Value: 17 | 0x011 | 0b00010001

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