In some cases, Tigase allows registering an account with the username which is already taken. In this case, it changes the password of the existing account.
Andrzej Wójcik (Tigase) commented 7 years ago
This issue existed only when accounts information were stored in DerbyDB.
In some cases, Tigase allows registering an account with the username which is already taken. In this case, it changes the password of the existing account.