Getting error about merging the file

er --allow-unrelated-histories
error: Pulling is not possible because you have unmerged files.
hint: Fix them up in the work tree, and then use 'git add/rm ’
hint: as appropriate to mark resolution and make a commit.
fatal: Exiting because of an unresolved conflict.
please help me to git out of this error .

kindly resolve merge conflicts
To know more about merge conflicts and to resolve merge conflicts watch this video