Ubuntu apt

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You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 grub-pc : Depends: grub-common (= 2.02~beta2-36ubuntu3.1)
 grub-pc-bin : Depends: grub-common (= 2.02~beta2-36ubuntu3.1)
 grub2-common : Depends: grub-common (= 2.02~beta2-36ubuntu3.1)