Why this PR debug build is getting failed in the CI system?

[nur-shuvo]

Hello,
Can anyone help me regarding the debug build failure? (#6063)

`> Task :app:validateSigningDebug

Task :app:writeDebugAppMetadata
Task :app:writeDebugSigningConfigVersions
Task :app:compileDebugKotlin
e: file:///home/runner/work/LibreTube/LibreTube/app/src/main/java/com/github/libretube/services/OnClearFromRecentService.kt:8:67 Unresolved reference: PLAYER_NOTIFICATION_ID
e: file:///home/runner/work/LibreTube/LibreTube/app/src/main/java/com/github/libretube/services/OnClearFromRecentService.kt:25:26 Unresolved reference: PLAYER_NOTIFICATION_ID

Task :app:compileDebugKotlin FAILED`

Locally everything is fine. Thanks in advance.