The final portion of the Model Prayer gives us instruction to seek protection from God by asking Him to not lead us into temptation and protect us from evil. This is a prayer seeking moral provision and is needed by all. What may seem confusing and even contradictory at first glance is proven to be neither.
Left to our own devices, we do not land on holiness.
While we pray for God's forgiveness for past sins, as instructed by Christ in the same prayer, the wise Christ follower also understands the need to seek guidance and protection for possible future sins. These are God's guardrails for our lives.