Encountered 7 file(s) that should have been pointers, but weren‘t

1、 Problem description ：
sourcetree After the file is temporarily stored and submitted , Or in the staging area . Then prompt ：
Encountered 7 file(s) that should have been pointers, but weren’t

2、 terms of settlement ：
git lfs uninstall
git reset --hard
git lfs install
git lfs pull
perhaps
git rm --cached -r .
git reset --hard
git rm .gitattributes
git reset .
git checkout .