old line not work after update to new version

[itrump]

After one has updated to a new release version on app store, old line config still shows on main ui.
But when one still use the old line, it does not work.
solution:

1. click 'i' button to enter edit line page, and then click 'Save' will fix the problem. Or
2. delete old lines, add new lines will also fix the problem.