I generate SQL query for item qty sum date wise , but error is coming (the column '30' was specified multiple times for 'stat'.)

SELECT DISTINCT EntryDate INTO #Date11
FROM Probale
--WHERE     (EntryDate BETWEEN @StartDate AND @Enddate)
ORDER BY EntryDate

DECLARE @cols NVARCHAR(4000)
SELECT  @cols = COALESCE(@cols + ',[' + CONVERT(varchar, DATEPART(DAY, EntryDate), 112)
				+ ']','[' + CONVERT(varchar,DATEPART(DAY, EntryDate), 112) + ']')
FROM    #Date
ORDER BY EntryDate


-- Building the query with dynamic dates
--DECLARE @qry NVARCHAR(4000)
--SET @qry =
--'SELECT * FROM
--(SELECT EmpID, Status , ReportingDate
--FROM EmployeesAttendance)emp
--PIVOT (MAX(Status) FOR ReportingDate IN (' + @cols + ')) AS stat'

DECLARE  @qry NVARCHAR(4000) =
N'SELECT * 
FROM (SELECT ItemMasterFile.Codeitem,ItemMasterFile.Descriptionitem,Probale.prdqty, 
DATEPART(DAY, Probale.EntryDate)as DDate
FROM Probale  Inner Join ItemMasterFile on Probale.Codeitem=ItemMasterFile.Codeitem )prd
PIVOT (Sum(prdqty) FOR DDate IN (' + @cols + ')) AS stat 
'
-- Executing the query

EXEC(@qry)