here are the simple steps
1- In Unity Lens , type passwords and keys
2- press the view in the menu bar, then check "by keyring"
3- a menu on the left will appear, right click on login, then change password
4- It will ask you for your old key-ring password, insert the old password and when it asks you for a new one, just leave it empty and press continue
5- Repeat step 3 for "Default" instead of "Login"
hopefully that will end your pain too