The problem lies here.
partition:
ID-1: / raw size: N/A size: 2.81 GiB used: 107.7 MiB (3.7%) fs: overlay source: ERR-102
[Root-Tip] Dual Boot Manjaro and Windows
If you no longer want to use the Windows partition 7, delete the entire partitions by pressing GParted
create a new partition table GPT.
But ATTENTION save your documents first
Then create the partitions for
/boot # Do not forget to set flags
/swap #linuxswap
/root # 65 GB min
/home # Rest