Hi @Moataz Shaaban ,
You need to find the reason for the SID being duplicated accross your environment. One of the most common reasons is that the image has not been generalized.
Now to your actual question: Is this a problem and is this a problem for SCOM?
the answer to the second question is - "Most probably not". This can also be the answer to the first question, but it depends on other factors too. My sencere recommendation is to read the following blog post, wrtitten by Mark Russinovich and in particular the section "SID Duplication":
The Machine SID Duplication Myth (and Why Sysprep Matters)
https://techcommunity.microsoft.com/t5/windows-blog-archive/the-machine-sid-duplication-myth-and-why-sysprep-matters/ba-p/723859
here you will find also more detailed info on SIDs:
Security Identifiers - MS Docs
When exactly a SID duplication can be a problem is described in the firts reference I've posted, but It is still very important that you indentify the source of the issue and ensure that the rest of the computers in your environments are installed from generalized (syspreped) image!
I hope I could help!
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Regards,
Stoyan