The issue is trap defined in NewDell10892.mib are redundant. They are a part of Dell10892.mib
Now if you want to import the new mib. delete Dell10892 and then import NewDell10892.mib
mxmib -d Dell10892.mib
then use
mxmib -a NewDell10892.cfg
Please check the image attched.
IMPORTING CFG NewDell10892.cfg
Trap: alertCoolingDeviceNormal is redundant.
Trap: alertProcessorDeviceStatusFailure is redundant.
Trap: alertChassisIntrusionDetected is redundant.
Trap: alertFanEnclosureRemoval is redundant.
Trap: alertLogFull is redundant.
Trap: alertProcessorDeviceStatusWarning is redundant.
Trap: alertFanEnclosureInsertion is redundant.
Trap: alertCoolingDeviceNonRecoverable is redundant.
Trap: alertLogWarning is redundant.
Trap: alertRedundancyDegraded is redundant.
Trap: alertCoolingDeviceFailure is redundant.
Trap: alertPowerSupplyFailure is redundant.
Trap: alertLogNormal is redundant.
Trap: alertVoltageProbeFailure is redundant.
Trap: alertMemoryDeviceFailure is redundant.
Trap: alertCoolingDeviceWarning is redundant.
Trap: alertACPowerCordFailure is redundant.
Trap: alertPowerSupplyWarning is redundant.
Trap: alertAmperageProbeNormal is redundant.
Trap: alertVoltageProbeWarning is redundant.
Trap: alertTemperatureProbeNonRecoverable is redundant.
Trap: alertMemoryDeviceWarning is redundant.
Trap: alertACPowerCordNoPowerNonRedundant is redundant.
Trap: alertMemoryDeviceNonRecoverable is redundant.
Trap: alertAutomaticSystemRecovery is redundant.
Trap: alertAmperageProbeNonRecoverable is redundant.
Trap: alertTemperatureProbeFailure is redundant.
Trap: alertSystemUp is redundant.
Trap: alertProcessorDeviceStatusNormal is redundant.
Trap: alertVoltageProbeNonRecoverable is redundant.
Trap: alertTemperatureProbeWarning is redundant.
Trap: alertChassisIntrusionNormal is redundant.
Trap: alertUserHostSystemReset is redundant.
Trap: alertFanEnclosureExtendedRemoval is redundant.
Trap: alertRedundancyNormal is redundant.
Trap: alertACPowerCordNormal is redundant.
Trap: alertAmperageProbeFailure is redundant.
Trap: alertRedundancyLost is redundant.
Trap: alertThermalShutdown is redundant.
Trap: alertAmperageProbeWarning is redundant.
Trap: alertVoltageProbeNormal is redundant.
Trap: alertPowerSupplyNormal is redundant.
Trap: alertTemperatureProbeNormal is redundant.
Please delete the old MIB and then add the current MIB.
COMMAND COMPLETED SUCCESSFULLY