Scheduled Job Problem

I have been struggling recently with configuring a scheduled job to run some functions I have created and placed in a module. The two functions I have created work perfectly when executed at the console and I have tested them as a background job as well and had no problems. Here is the code I am using to create the scheduled job:

$AtStartup = New-JobTrigger -AtStartup
$AtLogon = New-JobTrigger -AtLogOn
$Midnight = New-JobTrigger -Daily -At "12 AM"

$OptionParams = @{
    StartIfOnBattery = $true
    ContinueIfGoingOnBattery = $true
    RequireNetwork = $true
    MultipleInstancePolicy = 'StopExisting'
}

$JobOptions = New-ScheduledJobOption @OptionParams

$JobParams = @{
    Name = 'Something'
    ScriptBlock = {Get-Something | Set-Something}
    Trigger = $AtStartup,$AtLogon,$Midnight
    ScheduledJobOption = $JobOptions
    InitializationScript = {Import-Module MyModule}
}

Register-ScheduledJob @JobParams 

When I run this it creates the job and the triggers look ok. However, when it runs I get the following error from the job:

Receive-Job : Running startup script threw an error: The scheduled job definition Something already exists in the job definition store..
At line:1 char:11+ get-job | Receive-Job -Keep+           ~~~~~~~~~~~~~~~~~+ CategoryInfo          : InvalidResult: (:) [Receive-Job], RemoteException+ FullyQualifiedErrorId : ScheduledJobFailedState

Any thoughts why this might be happening? Thanks!