error in running a stored procedure in mssql

USE [Testdb]
GO

DECLARE	@return_value int

EXEC	@return_value = [dbo].[TestData]
		@group = 120,
		@lang = 9,
		@langcode = 999,		
		@value = 'aaa',
		@min = 22916,
		@dec = 2,000000

SELECT	'Return Value' = @return_value

GO

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Msg 119, Level 15, State 1, Line 4
Must pass parameter number 7 and subsequent parameters as '@name = value'. After the form '@name = value' has been used, all subsequent parameters must be passed in the form '@name = value'.

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