Does the prayer become invalid if the worshipper prostrates with his feet lifted off the ground, and is the command in the noble Hadith, "I was commanded to prostrate on seven bones," for obligation?

The feet should not be lifted off the ground during prostration, as this contradicts the command of the Prophet, peace and blessings be upon him, who said: "I have been commanded to prostrate on seven bones: on the forehead – and he pointed with his hand to his nose – and the hands, and the knees, and the tips of the feet; and not to tuck up clothes and hair." If the feet are lifted after being placed, or replaced after being lifted, there is nothing wrong with the prayer, as the prostration has occurred, but it is contrary to the Sunnah. If he did not prostrate on them at all, his prayer is valid according to the Malikis and those who agree with them, but it is recommended for him to repeat the prayer within its time. Scholars have differed on whether it is obligatory to prostrate on all seven limbs or on the forehead only.