keep having fsck error on boot, also the reinstllation of any Ubuntu version gets stuck

I am using a dual boot laptop with ubuntu 18.04.3 lts and windows 10. For some unknown reason after an ubuntu update and system restart I got the following error: /dev/sda6: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY. (i.e., without -a or -p options) fsck exited with status code 4 The root filesystem on /dev/sda6 requires a…

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