Step 5 of 9 Mailbox role: Mailbox service error

I am doing a upgrade from a early release of Exchange 2013 and I am getting this error

Error:
The following error was generated when "$error.Clear();
          if ($RoleIsDatacenter -ne $true)
          {
            if (test-ExchangeServersWriteAccess -DomainController $RoleDomainController -ErrorAction SilentlyContinue)
            {
              $sysMbx = $null;
              $name = "SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}";
              $dispname = "Microsoft Exchange";
              $mbxs = @( get-mailbox -arbitration -Filter {name -eq $name} -IgnoreDefaultScope -resultSize 1 );
              if ( $mbxs.length -eq 0)
              {
                $dbs = @(get-MailboxDatabase -Server:$RoleFqdnOrName -DomainController $RoleDomainController);
                if ($dbs.Length -ne 0)
                {
                  $arbUsers = @(get-user -Filter {name -eq $name} -IgnoreDefaultScope -ResultSize 1);
                  if ($arbUsers.Length -ne 0)
                  {
                    $sysMbx = enable-mailbox -Arbitration -identity $arbUsers[0] -DisplayName $dispname -database $dbs[0].Identity;
                  }
                }
              }
              else
              {
                if ($mbxs[0].DisplayName -ne $dispname )
                {
                   set-mailbox -Arbitration -identity $mbxs[0] -DisplayName $dispname -Force;
                }
                $sysMbx = $mbxs[0];
              }

              # Set the Organization Capabilities needed for this mailbox
              if ($sysMbx -ne $null)
              {
                  Write-ExchangeSetupLog -Info ("Setting mailbox properties.");
                  set-mailbox -Arbitration -identity $sysMbx -UMDataStorage:$true -Force;

                  # No RetentionPolicy assigned to E-Discovery arbitration mailbox currently, we need to set it here.
                  # This can be remove after BUG(O15#2555914) is fixed.
                  if ($sysMbx.RetentionPolicy -eq $null )
                  {
                     $arbitrationRetentionPolicy = @(Get-RetentionPolicy -DomainController $RoleDomainController | where {$_.Name -eq 'ArbitrationMailbox'});
                     set-mailbox -Arbitration -identity $sysMbx -RetentionPolicy $arbitrationRetentionPolicy[0].Identity -Force;
                  }
              }
              else
              {
                Write-ExchangeSetupLog -Info ("Cannot find E-discovery arbitration mailbox with name=$name.");
              }
            }
            else
            {
              write-exchangesetuplog -info "Skipping creating Discovery Arbitration Mailbox because of insufficient permission."
            }  
          }
        " was run: "Database is mandatory on UserMailbox.".

Error:
The following error was generated when "$error.Clear();
          if ($RoleIsDatacenter -ne $true)
          {
            if (test-ExchangeServersWriteAccess -DomainController $RoleDomainController -ErrorAction SilentlyContinue)
            {
              $sysMbx = $null;
              $name = "SystemMailbox{e0dc1c29-89c3-4034-b678-e6c29d823ed9}";
              $dispname = "Microsoft Exchange";
              $mbxs = @( get-mailbox -arbitration -Filter {name -eq $name} -IgnoreDefaultScope -resultSize 1 );
              if ( $mbxs.length -eq 0)
              {
                $dbs = @(get-MailboxDatabase -Server:$RoleFqdnOrName -DomainController $RoleDomainController);
                if ($dbs.Length -ne 0)
                {
                  $arbUsers = @(get-user -Filter {name -eq $name} -IgnoreDefaultScope -ResultSize 1);
                  if ($arbUsers.Length -ne 0)
                  {
                    $sysMbx = enable-mailbox -Arbitration -identity $arbUsers[0] -DisplayName $dispname -database $dbs[0].Identity;
                  }
                }
              }
              else
              {
                if ($mbxs[0].DisplayName -ne $dispname )
                {
                   set-mailbox -Arbitration -identity $mbxs[0] -DisplayName $dispname -Force;
                }
                $sysMbx = $mbxs[0];
              }

              # Set the Organization Capabilities needed for this mailbox
              if ($sysMbx -ne $null)
              {
                  Write-ExchangeSetupLog -Info ("Setting mailbox properties.");
                  set-mailbox -Arbitration -identity $sysMbx -UMDataStorage:$true -Force;

                  # No RetentionPolicy assigned to E-Discovery arbitration mailbox currently, we need to set it here.
                  # This can be remove after BUG(O15#2555914) is fixed.
                  if ($sysMbx.RetentionPolicy -eq $null )
                  {
                     $arbitrationRetentionPolicy = @(Get-RetentionPolicy -DomainController $RoleDomainController | where {$_.Name -eq 'ArbitrationMailbox'});
                     set-mailbox -Arbitration -identity $sysMbx -RetentionPolicy $arbitrationRetentionPolicy[0].Identity -Force;
                  }
              }
              else
              {
                Write-ExchangeSetupLog -Info ("Cannot find E-discovery arbitration mailbox with name=$name.");
              }
            }
            else
            {
              write-exchangesetuplog -info "Skipping creating Discovery Arbitration Mailbox because of insufficient permission."
            }  
          }
        " was run: "Database is mandatory on UserMailbox. Property Name: Database".