How to fix "Problem with MergeList /var/lib/apt/lists/"

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Sometimes, and more often, an update on RaspberryPi hangs with: "Problem with MergeList ..."

sudo mv /var/lib/apt/extended_states /var/lib/apt/extended_states_tmp && rm -rf /var/lib/apt/lists/* -vf && sudo apt-get update

solves the issue.


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