I am trying to install Sitecore 10. I am getting the below error.

The compatibility level of the target schema 150 is not supported

can you please help? given below is the screenshot.

enter image description here

  • Which version of MSSQL are you running?
    – Mark Cassidy
    Commented Sep 26, 2021 at 8:56

1 Answer 1


This error occurred because, my previous installation failed.

The previous installation had created few DBs with the Sitecore Prefix name provided during installation. that was the cause of error.

I deleted all the DBs created by prefix name, and re-run the installer, it worked. The installation was successful.

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