Android App .p12 Key Update

I'm searching for a professional who can address the issue of an incorrect .p12 key in my Android application.

Key Tasks:
- Troubleshoot the current .p12 key to identify the cause of the issue
- Generate a new key for the application
- Update the app with the new key to ensure proper functionality

Experience and Skills:
- Demonstrable experience with Android app development
- Proficiency in handling .p12 key issues
- Strong knowledge of Android security protocols and practices

I'd appreciate someone who can take care of this process. The applicant should also be able to confirm compatibility of the new key with the versions of Android the app is currently supporting. Please include any relevant experience you have in maintaining and updating Android apps in your proposal.