My build pipeline in Azure DevOps running twice for each push - azure-devops

Question

I tried to build a CI/CD pipeline for my project on Azure DevOps. I was successful for sometime but now i can find that my dev branch's code push is initiating the build pipeline for two times, one in master pipeline and one in dev pipeline and i am also having two releases in my app center. I tries checking triggers and all on my trigers page in Azure DevOps but that wasn't any helpful. Can anyone out there help me out in this. Thank you.
The following is my YAML configuration file:
For Master
trigger:
- master
pool:
vmImage: 'macos-latest'
steps:
- task: Gradle#2
inputs:
workingDirectory: ''
gradleWrapperFile: 'gradlew'
gradleOptions: '-Xmx3072m'
publishJUnitResults: false
tasks: 'assembleRelease'
- task: AndroidSigning#3
inputs:
apkFiles: '**/*.apk'
apksignerKeystoreFile: 'key store file'
apksignerKeystorePassword: '$(keyPassword)'
apksignerKeystoreAlias: 'alias'
apksignerKeyPassword: '$(keyPassword)'
- task: CopyFiles#2
inputs:
SourceFolder: '$(Agent.BuildDirectory)'
Contents: '**/*.apk'
TargetFolder: '$(Build.ArtifactStagingDirectory)'
- task: PublishBuildArtifacts#1
inputs:
PathtoPublish: '$(Build.ArtifactStagingDirectory)'
ArtifactName: 'artifact'
publishLocation: 'Container'
- task: AppCenterDistribute#3
inputs:
serverEndpoint: 'VSAC'
appSlug: 'app slug'
appFile: '**/*.apk'
symbolsOption: 'Android'
releaseNotesOption: 'input'
releaseNotesInput: 'CICD Release Build'
destinationType: 'groups'
distributionGroupId: 'dist group id'
For Dev
trigger:
- dev
pool:
vmImage: 'macos-latest'
steps:
- task: Gradle#2
inputs:
workingDirectory: ''
gradleWrapperFile: 'gradlew'
gradleOptions: '-Xmx3072m'
publishJUnitResults: false
tasks: 'assembleRelease'
- task: AndroidSigning#3
inputs:
apkFiles: '**/*.apk'
apksignerKeystoreFile: 'key store file'
apksignerKeystorePassword: '$(keyPassword)'
apksignerKeystoreAlias: 'alias'
apksignerKeyPassword: '$(keyPassword)'
- task: CopyFiles#2
inputs:
SourceFolder: '$(Agent.BuildDirectory)'
Contents: '**/*.apk'
TargetFolder: '$(Build.ArtifactStagingDirectory)'
- task: PublishBuildArtifacts#1
inputs:
PathtoPublish: '$(Build.ArtifactStagingDirectory)'
ArtifactName: 'artifact'
publishLocation: 'Container'
- task: AppCenterDistribute#3
inputs:
serverEndpoint: 'VSAC'
appSlug: 'app slug'
appFile: '**/*.apk'
symbolsOption: 'Android'
releaseNotesOption: 'input'
releaseNotesInput: 'CICD Release Build'
destinationType: 'groups'
distributionGroupId: 'dist group id'