Rename the User Presets folder
In File Explorer (Win) / Finder (Mac), navigate to the folder path mentioned below:
Windows: \Users\[user]\AppData\Roaming\Adobe\Lightroom CC\Develop Presets
Mac: /Users/[user name]/Library/Application Support/Adobe/Lightroom CC/Develop Presets
Under the Develop Presets folder, locate the User Presets folder and temporarily rename it to any other name.