「求助」ttf-dejavu好像跟什么东西冲突了？

(9/9) checking keys in keyring [######################] 100%
(9/9) checking package integrity [######################] 100%
(9/9) loading package files [######################] 100%
(9/9) checking for file conflicts [######################] 100%
error: failed to commit transaction (conflicting files)
ttf-dejavu: /etc/fonts/conf.d/20-unhint-small-dejavu-sans-mono.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/20-unhint-small-dejavu-sans.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/20-unhint-small-dejavu-serif.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/57-dejavu-sans-mono.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/57-dejavu-sans.conf exists in filesystem
ttf-dejavu: /etc/fonts/conf.d/57-dejavu-serif.conf exists in filesystem
Errors occurred, no packages were upgraded.
把原来skyshe的源换成了ustc的源，结果ttf-dejav这个包好像想不开了？