I used the bank account in accounting module.

When registering a new bank account, all the external registering is ok.

Then odoo displays a screen with a waiting wheel turning.

It suggests odoo is waiting for the external application to signal the bank account was correctly registered.

After a few minutes, it is obvious that odoo did not received acknowledgement of the bank registration.

Then I click on "continue" button.

I get back to the accounting module.

The workflow displays the "bank registration" as not operated.

Then I launch again the registration, thinking something did not occured as expected.

The same process goes on.

Then in the dashboard, there is a graph for every attempt to register to the same bank account.

More over each attempt to connect tot the same bank account is cumulated in the overall accounting sum.

More over I did not found any mean in order to remove these duplicated bank accounts.