Error 0x87C5100F

Value: -2017128433 | 0x87C5100F | 2277838863

What does it mean ?

UTC_E_ESCALATION_ALREADY_RUNNING  
A scenario failed to escalate: This scenario is already running an escalation
Value: 4111 | 0x100F | 0b0001000000001111

Where does it come from ?

FACILITY_UTC  
Diagnostic Tracking (Service utcsvc "DiagTrack")
Value: 1989 | 0x7C5 | 0b11111000101

Other Errors for FACILITY_UTC