How to execute an insert stored procedure without setting IDENTITY_Insert ON?

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SQL

SQL-Server-2008R2

I have a script for table creation here as :

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[PluginSettingXrefValue](
	[PluginSettingXrefValueID] [uniqueidentifier] NOT NULL CONSTRAINT [DF_PluginSettingXrefValue_PluginSettingXrefValueID]  DEFAULT (newsequentialid()),
	[PluginSettingInstanceID] [int] NOT NULL,
	[PluginSettingID] [uniqueidentifier]  NOT NULL,
	[PluginSettingValue] [nvarchar](200) NULL,
	[CreatedDate] [datetime] NOT NULL CONSTRAINT [DF_PluginSettingXrefValue_ris_CreatedDate]  DEFAULT (getdate()),
	[CreatedBy] [nvarchar](200) NULL,
	[UpdatedDate] [datetime] NULL,
	[UpdatedBy] [nvarchar](200) NULL,
	[PluginID] [int] IDENTITY(1,1) NOT NULL
 CONSTRAINT [PK_PluginSettingXrefValue] PRIMARY KEY CLUSTERED 
(
	[PluginSettingXrefValueID] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
) ON [PRIMARY]
GO

And a stored procedure to insert Values in the table :

/****** Object:  StoredProcedure [dbo].[usp_CopyPluginSettingToXrefValue]    Script Date: 07/22/2014 11:32:45 ******/

Create Procedure [dbo].[usp_CopyPluginSettingToXrefValue]
(
@InstanceId int
)
As
Begin
declare @result as bit
IF  EXISTS (SELECT * FROM PlugInSettingValues)
BEGIN
IF  NOT EXISTS (SELECT * FROM PluginSettingXrefValue where PluginSettingInstanceId=@InstanceId)
BEGIN
     insert into PluginSettingXrefValue(PluginSettingInstanceID,PluginSettingID,
PluginSettingValue,CreatedDate,CreatedBy,UpdatedDate,UpdatedBy,PluginID) 
select @InstanceId,PlugInSettingID,PlugInSettingValue,GETDATE(),CreatedBy,null,null,PlugInID from PlugInSettingValues
set @result=1
END
END
End
RETURN @result
GO

But i am getting an error while executing the stored procedure only and a simple insert query i.e.

insert into PluginSettingXref values('2365700a-4c0e-e411-a3e4-5c260a0854c3',1,'24065243-d2ed-40f4-a275-021dc14cf746','false','2014-07-18 12:50:49.337',NULL,NULL,NULL)

is giving an error :

An explicit value for the identity column in table 'PluginSettingXrefValue' can only be specified when a column list is used and IDENTITY_INSERT is ON.

What is going wrong here?
Setting Identity_Insert ON is not an option as it might give a room for injection attacks.