Unable to rename input apk issue

When Crashlytics is integrated into an APK, Appium can no longer rename input apk. What causes this? and how do i get around it?

Stack Trace as follows:

[31merror[39m: Failed to start an Appium session, err was: Error: Command failed: C:\Windows\system32\cmd.exe /s /c “java -jar “C:\Program Files (x86)\Appium\node_modules\appium\node_modules\appium-adb\jars\sign.jar” C:\sampleAPK\app-Stage-debug.apk --override”
Exception in thread “main” java.lang.RuntimeException: Unable to rename input apk. C:\sampleAPK\app-Stage-debug.apk
at s.Sign.sign(Sign.java:421)
at s.Sign.main(Sign.java:532)
[36minfo[39m: [debug] Error: Command failed: C:\Windows\system32\cmd.exe /s /c “java -jar “C:\Program Files (x86)\Appium\node_modules\appium\node_modules\appium-adb\jars\sign.jar” C:\sampleAPK\app-Stage-debug.apk --override”
Exception in thread “main” java.lang.RuntimeException: Unable to rename input apk. C:\sampleAPK\app-Stage-debug.apk
at s.Sign.sign(Sign.java:421)
at s.Sign.main(Sign.java:532)
at ChildProcess.exithandler (child_process.js:213:12)
at emitTwo (events.js:87:13)
at ChildProcess.emit (events.js:172:7)
at maybeClose (internal/child_process.js:827:16)
at Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)