How to transpose the columns in a SQL select statement - sql

Question

I have a table named Ingresos_Ppto with this definition:
ID int PK
IdCliente int
FechaPpto Datetime
Rubro varchar(max)
Valor numer(18,0)
When I run a select statement for IdCliente = 1, I get this result:
SELECT
*
FROM
[dbo].[Ingresos_Ppto] [Y]
WHERE
([Y].[IdCliente] = #idc)
Output:
ID| IdCliente | FechaPpto | Rubro | Valor
+-+-----------+------------+----------------------------+--------------
1 | 1 | 2019-01-01 | Portal web WP | 9148489.00
2 | 1 | 2019-01-01 | Portal web WP + ecommerce | 3785304.00
3 | 1 | 2019-01-01 | Renting tecnológico | 7223406.00
4 | 1 | 2019-01-01 | Branding | 3280937.00
5 | 1 | 2019-01-01 | Mercadeo y publicidad | 3372619.00
6 | 1 | 2019-02-01 | Portal web WP | 9172295.00
7 | 1 | 2019-02-01 | Portal web WP + ecommerce | 9140700.00
8 | 1 | 2019-02-01 | Renting tecnológico | 7298693.00
9 | 1 | 2019-02-01 | Branding | 4912017.00
I need to transpose the columns, so that I can get Rubro, and columns according to the date of the budget, this will be the desired output:
Rubro | 2019-01 | 2019-02
+--------------------------+--------------+-------------
Portal web WP | 9148489.00 | 9172295.00
Portal web WP + ecommerce | 3785304.00 | 9140700.00
Renting tecnológico | 7223406.00 | 72986693.00
Branding | 3280937.00 | 4912017.00
Mercadeo y publicidad | 3372619.00 | 0.00
This is my code so far, but it won't run:
DECLARE #cols AS NVARCHAR(MAX),
#query AS NVARCHAR(MAX)
SELECT #cols = STUFF((SELECT ',' + QUOTENAME(FechaPpto)
FROM Ingresos_Ppto
GROUP BY FechaPpto, id
ORDER BY id
FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)'), 1, 1, '')
SET #query = N'SELECT ' + #cols + N' from
(
select Rubro, FechaPpto
from Ingresos_Ppto
) x
pivot
(
max(Rubro)
for FechaPpto in (' + #cols + N')
) p '
exec sp_executesql #query;
I get this error:
Msg 8156, Level 16, State 1, Line 12
The column 'Jan 1 2019 12:00AM' was specified multiple times for 'p'
How can I rewrite the code to achieve the desired result?