E2186 Cmd Rej: Capability point code already defined as a route DPC
The value specified for the cpc parameter cannot be already assigned as a route destination point code (DPC).
Recovery
Display the existing route DPCs. Enter the rtrv-dstn command.
Re-enter the chg-sid command that generated this error message, specifying a valid combination of parameters. Refer to the command description in Commands User's Guide and to the Database Administration - SS7 User's Guide for assistance.