GIT提交报错，是什么意思呢？

Question

git-cdiff.mnemonicprefix=false-ccore.quotepath=false-ccredential.helper=sourcetreecommit-q-F/var/folders/c1/1l_k0nkj5zl0f26qll1p40sm0000gn/T/SourceTreeTemp.DTlcFH
git-cdiff.mnemonicprefix=false-ccore.quotepath=false-ccredential.helper=sourcetreepush-v--set-upstreamoriginrefs/heads/Dev:refs/heads/Dev
2018-01-0311:28:28.359git-credential-sourcetree[7881:213624]Error(internetKeychainItemForServer:withUsername:path:port:protocol:)-Thespecifieditemcouldnotbefoundinthekeychain.
Tohttps:**********.git（这里是我隐藏的Git地址）
![rejected]Dev->Dev(non-fast-forward)
error:failedtopushsomerefsto'https:**********.git（这里是我隐藏的Git地址）'
hint:Updateswererejectedbecausethetipofyourcurrentbranchisbehind
hint:itsremotecounterpart.Integratetheremotechanges(e.g.
hint:'gitpull...')beforepushingagain.
hint:Seethe'Noteaboutfast-forwards'in'gitpush--help'fordetails.
Completedwitherrors,seeabove
这是什么错啊，不能提交啊？

Answer 1

你当前分支落后了，先pull一下，再提交。hint:'gitpull...')beforepushingagain.//看这句

Answer 2

.....别的电脑修改了然后已经提交，你换了台电脑修改在提交....当然提交不上去....本地仓库跟远程仓库冲突，先把远程仓库的更新跟你本地的同步了，在提交。