This mailbox database is associated with one or more active PublicFolderMove requests

Question

I'm trying to clean up an Exchange 2013 installation (CU2) which is the result of a migrated Exchange 2007 done last summer.
This installation contained several databases which we are trying to slim down to just one, but I've run into some trouble deleting one of these databases. I've made sure that there's nothing left in the database but the Monitoring mailboxes, but when I
try to delete the database I get the following error:
This mailbox database is associated with one or more active PublicFolderMove requests. To get a list of all PublicFolderMove requests associated with this database, run Get-PublicFolderMoveRequest | ?{ $_.RequestQueue -eq "Public Folder Database" }. To remove a PublicFolderMove request, run Remove-PublicFolderMoveRequest <Recipient ID\Request Name>.
If I look into that one further I can see the following:
[PS] C:\Windows\system32>Get-PublicFolderMoveRequest | fl
RunspaceId : d07e91a4-aadb-4c2a-8e01-68127464e8e0
SourceMailbox : contoso.local/Users/Contoso
TargetMailbox :
Name : PublicFolderMove
RequestGuid : 65c5d048-0e56-4c01-88ce-8594699826ee
RequestQueue : Public Folder Database
Flags : IntraOrg, Pull
BatchName :
Status : InProgress
Protect : False
Suspend : False
Direction : Pull
RequestStyle : IntraOrg
OrganizationId :
WhenChanged : 2013-06-25 16:03:10
WhenCreated : 2013-06-25 16:03:07
WhenChangedUTC : 2013-06-25 14:03:10
WhenCreatedUTC : 2013-06-25 14:03:07
Identity : \PublicFolderMove
IsValid : True
ObjectState : New
So, I've found out that I can run "Remove-PublicFolderMoveRequest <Recipient ID\Request Name>" to remove that request, but I find it a little disturbing that we've had that job for 9 months in the background, and I'm unsure of what will happen
if I actually delete that job.
The Target Mailbox is also empty. Shouldn't it contain something?
We want to keep the Public Folder Database in the current database and it should not have anything to do with the database I'm trying to delete (it does not reside there right now).
Any thoughts on how to proceed, and what the reason for this might be? Could it be something that was done while migrating from E2k7 to E2k13 and never was cleaned up correctly?
Any thoughts will be greatly appreciated!

Answer 1

Yeah, thanks! But, the problem is that I can't delete it because of the error message in the first post ;) Namely: 
This mailbox database is associated with one or more active PublicFolderMove requests. To get a list of all PublicFolderMove requests associated with this database, run Get-PublicFolderMoveRequest | ?{ $_.RequestQueue -eq "Public Folder Database" }. To remove a PublicFolderMove request, run Remove-PublicFolderMoveRequest <Recipient ID\Request Name>.