maven项目启动时报错,好像是编译错误

[INFO] Scanning for projects...
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[WARNING] 'dependencies.dependency.(groupId:artifactId:type:classifier)' must be unique: commons-logging:commons-logging:jar -> version 1.1.3 vs 1.1.1 @ line 245, column 15
[ERROR] Child module F:\workspaces-itcast\appshop\appshop-parent\appshop-web of F:\workspaces-itcast\appshop\appshop-parent\pom.xml does not exist @
@
[ERROR] The build could not read 1 project -> [Help 1]
[ERROR]

[ERROR] The project com.baidu:appshop-parent:0.0.1-SNAPSHOT (F:\workspaces-itcast\appshop\appshop-parent\pom.xml) has 1 error
[ERROR] Child module F:\workspaces-itcast\appshop\appshop-parent\appshop-web of F:\workspaces-itcast\appshop\appshop-parent\pom.xml does not exist
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
大神求帮忙

groupId:artifactId:type:classifier)' must be unique: commons-logging 标识号必须唯一
Child module F:\workspaces-itcast\appshop\appshop-parent\appshop-web of F:\workspaces-itcast\appshop\appshop-parent\pom.xml does not exist XML中引用的子module不存在

你是怎么解决的 求教 大神

[ERROR] Some problems were encountered while processing the POMs:
[ERROR] Non-resolvable import POM: Could not transfer artifact org.springframework.cloud:spring-cloud-dependencies:pom:Finchley.SR2 from/to nexus (http://maven.aliyun.com/nexus/content/repositories/central/): maven.aliyun.com @ line 35, column 16
[ERROR] 'dependencies.dependency.version' for org.springframework.cloud:spring-cloud-starter-config:jar is missing. @ line 53, column 15
@

我今天也遇到这个错了,我是打包的时候给我报的这个错,我是将出错的包删了,重新下载。然后将打的包全部清除
project-->clean

最后再重新打边包 ,就不报错了。

查看下 F:\workspaces-itcast\appshop\appshop-parent\pom.xml 中
appshop-web的名字是不是不正确

我就报最后一个For more information about..那个,有人知道怎么解决ma