Powershell command for New-mailboxrestorerequest

Question

Dear Team, We are running a powershell for moving a mailbox data to office 365 mailbox with below powershell command. It gives me an error message that similar email address is present in the organisation. Please suggest.

New-MailboxRestoreRequest
   -SourceStoreMailbox <StoreMailboxIdParameter>
   -TargetMailbox <MailboxLocationIdParameter>
   
   [-AllowLegacyDNMismatch]
   [-AssociatedMessagesCopyOption <FAICopyOption>]
   [-BadItemLimit <Unlimited>]
   [-BatchName <String>]
   [-CompletedRequestAgeLimit <Unlimited>]
   [-Confirm]
   [-ConflictResolutionOption <ConflictResolutionOption>]
   [-ContentFilter <String>]
   [-ContentFilterLanguage <CultureInfo>]
   [-DomainController <Fqdn>]
   [-ExcludeDumpster]
   [-ExcludeFolders <String[]>]
   [-IncludeFolders <String[]>]
   [-InternalFlags <InternalMrsFlag[]>]
   [-LargeItemLimit <Unlimited>]
   [-Name <String>]
   [-Priority <RequestPriority>]
   [-RequestExpiryInterval <Unlimited>]
   
   [-SourceRootFolder <String>]
   [-Suspend]
   [-SuspendComment <String>]
   [-TargetIsArchive]
   [-TargetRootFolder <String>]
   [-Ta