Hi, @Ayman NAJID
Thank you for posting in Microsoft Q&A forum.
We can see the update is not removable in WSUS console, so the error message is normal.
From this link, we can see:
To remove the LCU after installing the combined SSU and LCU package, use the DISM/Remove-Package command line option with the LCU package name as the argument. You can find the package name by using this command: DISM /online /get-packages.
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