Hey @zelterNN - Which Retool version are you on? There was a bug that allowed incorrectly creating multiple organizations by going through the sign up flow more than once, but it was patched at some point.
In any case once you're in this state, you'll just need to manually delete the user with the duplicate email from the users table in the Postgres database your Retool instance is running on. This is likely going to be the user with organizationId that isn't 1.