Hi there, kolchinskyalexan.
The message indicates that we are connecting a parent credit card account and its sub-accounts. We can only connect one account either the parent or the sub-accounts.
If all transactions are coming form the parent account we'll want to connect it instead. If they are downloaded to the sub-accounts, we can select all applicable sub-accounts. We can look into this article for more information: About bank or credit card subaccount setup.
Let me know if you need anything else. Thanks!
