The new version is signed with a different key to the old one. To install the new version, the old one must be uninstalled first. Please do this and try again. (Note that uninstalling will erase any internal data stored by the app)
Lqem amaynut yettwazmel s tsarut yemgaraden ɣef lqem aqbur. Akken ad tesbeddeḍ lqem amaynut, yessefk ad tekkseḍ lqem aqbur. Ttxil xdem aya tɛerḍeḍ tikkelt-nniḍen. (Ẓer dakken Tukksa ad tesfeḍ akk isefka igensanen yettwaskelsen s usnas)