Most apps permit only 1 active connection from services like Workato to be established, i.e. you can only have 1 active connection to your app via your Workato account.
Your connection can be invalidated/invalidating another connection under these circumstance:
2) You or another Workato user from your company has created another connection to the same enterprise account with different credentials (different user login and password), i.e. a second connection to a QuickBooks Online enterprise account will invalidate the first connection to that same QuickBooks Online enterprise account.