Eclipse SessionNotCreatedException

Hello,
I get a SessionNotCreatedException:
org.openqa.selenium.SessionNotCreatedException: A new session could not
be created. (Original error: Remote install failed: pkg:
/data/local/tmp/7757ea084ceb1ed2a3abf2e089215c56.apk

Failure [INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES]

What should I do?