You can follow below to deactivate auto correction suggestions

• Click your username in the upper right corner of the workspace
• Select Settings
• Go to Developer - Under Code Editor - Toggle OFF below settings
  • Automatic Genie Code Autocomplete - Disables AI based auto complete suggestions
  • Autocomplete as you type - Disables automatic suggestions
  • Enter key accepts autocomplete suggestions - Prevents Enter from inserting suggestions
  • SQL syntax error highlighting - You can disable it if error highlighting is also interfering in SQL editor

It will shut off all the autocomplete suggestions. You can also do it selectively based on cases.