Do you mean to turn off "Set Rating" that comes up while using Numeric keys(0 to 5) or that comes up when we Right click on Pictures in Grid View?
Sorry should have qualified.
Yes, how to turn off the Dialogue box when giving a 0-5 rating in Loupe (E) mode
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Thanks, These are Legacy keyboard shortcuts and cannot be turned off.You could request for a feature Recently active topics in Photoshop Family about Photoshop Lightroom or Feature Request/Bug Report Form
Thanks so much for looking into it Akash.
Seems like a wasted feature that just takes away from the editing process.