Important: If you are using Einstein Activity Capture (EAC) in parallel with Weflow, then you must adjust your EAC settings in order to avoid duplicate meetings in your Google / Outlook calendar.
Step 1: Go to settings in Salesforce
Go to the 'Setup' of your Salesforce account (you need admin access to do so)
Search for Einstein Activity Capture
Go to 'Settings'
Step 2: Find your EAC configuration
Go to 'Configuration'
Click 'Edit' on your configuration
Step 3: Adjust your EAC configuration
Scroll down to the first page of the configuration
Under 'Events, either deactivate the sync entirely or make sure that the only direction that is allowed is 'Google Suite to Salesforce'
All other settings will lead to duplicates in your calendar