E4489 Cmd Rej: Common screening list key must be unique
The leading digit pattern in the ds parameter must be unique in the specified screening list for the specified feature.
Recovery
Display the existing CSL entries. Enter the rtrv-csl command.
Re-enter the ent/chg-csl 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 appropriate feature manual for assistance.