Cannot start queue. SSP: SiteUID: Url: Queue: ProjectQ

Log Name: Application
Source: Microsoft-SharePoint Products-Project Server
Event ID: 7626
Task Category: Queue
Level: Critical
Description:
Cannot start queue. SSP: <GUID Project server application> SiteUID: <GUID Site> Url: Queue: ProjectQ

You also have his twin, with another Url: Queue: TimesheetQ

We are going to fix that, but for next time, you MUST delete PWA instance before Web Application.

#Get Project application

$a= get-spserviceapplication | ? {$_.Typename -like "*Project*"} 

#Check that we got the good ghost one (siteUID)

$bad=$a.SiteCollection | ?{$_.SiteID -eq "a2c27d0d-1e66-43af-94d2-83b1b268658f"} 

$bad| select id,name,siteid,webappid |fl

Id : 4d4389d1-e32b–43a3–8043–9105a83fceb8
Name : PWA ghost name:
SiteId : a2c27d0d–1e66–43af–94d2–83b1b268658f
WebAppId : 9a618b96–6b00–472c–93f7–4c5f53822050

#if ok, here we go! 

$bad.Delete() 

#Launch again previous command to confirm delete

$bad=$a.SiteCollection | ?{$_.SiteID -eq "a2c27d0d-1e66-43af-94d2-83b1b268658f"} 

$bad| select id,name,siteid,webappid |fl