I could solve it by: mv ~/.config/chromium/ ~/.config/chromium_old/
so a new set of config files are created, and then recovering the Bookmarks with Then cp ~/.config/chromium_old/Default/Bookmarks ~/.config/chromium/Default/
I could solve it by: mv ~/.config/chromium/ ~/.config/chromium_old/
so a new set of config files are created, and then recovering the Bookmarks with Then cp ~/.config/chromium_old/Default/Bookmarks ~/.config/chromium/Default/