Does inadvertently replacing "There is no strength nor power save in Allah" with "There is no strength nor power save in people" indicate a deficiency in sincerity or faith?

What emanated from you due to heedlessness and oversight does not indicate a deficiency in sincerity or faith, and you will not be held accountable for it. Allah Almighty says: "And there is no blame upon you for that in which you err, but [only for] what your hearts intended," and Allah said in the supplication: "Our Lord, do not impose blame upon us if we forget or make a mistake": "I have done so."