[BUG] Warnings appear when the camera is activated

Start by reproducing the reported output with rpicam-hello and the supplied Picamera2 script on the stated Raspberry Pi OS and hardware. Compare whether the warnings affect camera behavior, then inspect the relevant Picamera2/libcamera integration entry points. Done means identifying the source and required fix or documenting that the warnings are harmless.

Bug (or misconfiguration) description:
The hardware system I'm using (RPi4B, V2.1 camera and connection cable) has been working properly for a long time with Raspbian Buster OS and Python 3.7.
A couple of weeks ago, I updated the system to Raspberry OS BookWorm and Python 3.11 (the latest system image downloaded from the official website).
When starting to update the old applications, mainly replacing picamera with picamera2, the following warnings appear, which seem to indicate an incompatibility issue between the OS configuration and the picamera2 library.
I found quite a bit of information about some of these warnings, but not the solution.

Inputs and outputs:

• In terminal:

:~ $ rpicam-hello
[23:39:46.897521042] [18422]  INFO Camera camera_manager.cpp:284 libcamera v0.1.0+118-563cd78e
[23:39:46.973316013] [18425]  WARN RPiSdn sdn.cpp:39 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise
[23:39:46.976202702] [18425]  WARN RPI vc4.cpp:390 Mismatch between Unicam and CamHelper for embedded data usage!
[23:39:46.977105432] [18425]  INFO RPI vc4.cpp:444 Registered camera /base/soc/i2c0mux/i2c@1/imx219@10 to Unicam device /dev/media4 and ISP device /dev/media0
[23:39:46.977164784] [18425]  INFO RPI pipeline_base.cpp:1142 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml'
Made X/EGL preview window
Mode selection for 1640:1232:12:P
    SRGGB10_CSI2P,640x480/0 - Score: 4504.81
    SRGGB10_CSI2P,1640x1232/0 - Score: 1000
    SRGGB10_CSI2P,1920x1080/0 - Score: 1541.48
    SRGGB10_CSI2P,3280x2464/0 - Score: 1718
    SRGGB8,640x480/0 - Score: 5504.81
    SRGGB8,1640x1232/0 - Score: 2000
    SRGGB8,1920x1080/0 - Score: 2541.48
    SRGGB8,3280x2464/0 - Score: 2718
Stream configuration adjusted
[23:39:47.536555044] [18422]  INFO Camera camera.cpp:1183 configuring streams: (0) 1640x1232-YUV420 (1) 1640x1232-SBGGR10_CSI2P
[23:39:47.537185871] [18425]  INFO RPI vc4.cpp:608 Sensor: /base/soc/i2c0mux/i2c@1/imx219@10 - Selected sensor format: 1640x1232-SBGGR10_1X10 - Selected unicam format: 1640x1232-pBAA

But image windows appears as expected

• In Thonny, running Phyton:
  Program:

#!/usr/bin/python3

from picamera2 import Picamera2, Preview 

input('Press ENTER to begin')

picam2 = Picamera2()
picam2.start_preview(True)
preview_config = picam2.create_preview_configuration()
picam2.configure(preview_config)
picam2.start()

input('Press ENTER to finish')
picam2.stop_preview()

Output:

>>> %Run Prova.py
Press ENTER to begin
[24:00:32.592111269] [19268]  INFO Camera camera_manager.cpp:284 libcamera v0.1.0+118-563cd78e
[24:00:32.695629281] [19363]  WARN RPiSdn sdn.cpp:39 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise
[24:00:32.702006641] [19363]  WARN RPI vc4.cpp:390 Mismatch between Unicam and CamHelper for embedded data usage!
[24:00:32.703922090] [19363]  INFO RPI vc4.cpp:444 Registered camera /base/soc/i2c0mux/i2c@1/imx219@10 to Unicam device /dev/media4 and ISP device /dev/media0
[24:00:32.704036607] [19363]  INFO RPI pipeline_base.cpp:1142 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml'
[24:00:32.716635477] [19268]  INFO Camera camera_manager.cpp:284 libcamera v0.1.0+118-563cd78e
[24:00:32.771724495] [19366]  WARN RPiSdn sdn.cpp:39 Using legacy SDN tuning - please consider moving SDN inside rpi.denoise
[24:00:32.774247384] [19366]  WARN RPI vc4.cpp:390 Mismatch between Unicam and CamHelper for embedded data usage!
[24:00:32.775664522] [19366]  INFO RPI vc4.cpp:444 Registered camera /base/soc/i2c0mux/i2c@1/imx219@10 to Unicam device /dev/media4 and ISP device /dev/media0
[24:00:32.775963557] [19366]  INFO RPI pipeline_base.cpp:1142 Using configuration file '/usr/share/libcamera/pipeline/rpi/vc4/rpi_apps.yaml'
[24:00:34.851178386] [19268]  INFO Camera camera.cpp:1183 configuring streams: (0) 640x480-XBGR8888 (1) 640x480-SBGGR10_CSI2P
[24:00:34.852573691] [19366]  INFO RPI vc4.cpp:608 Sensor: /base/soc/i2c0mux/i2c@1/imx219@10 - Selected sensor format: 640x480-SBGGR10_1X10 - Selected unicam format: 640x480-pBAA
Press ENTER to finish
>>>

Also, image windows is shown as expected

To Reproduce
Run the command and application mentioned above in the same context

Expected behaviour
There shouldn't be any information or warning because it should be properly preconfigured, especially regarding warnings.

Console Output, Screenshots
N/A

Hardware :
Raspberry Pi 4B, 4 GB
Two Rasperry V2 cameras where tested, normal and NoIR.
Connection cable test is OK.
SSD Disk mounted, USB connetion.
Additional SD card to backup system.

Additional context
Newly installed OS from scratch. Last image (2024-01-015) download from official Raspberry Pi site.
Debian BookWorm 64 bits and Python 3.11
The only action taken before the picamera2 test was an upgrade.