Here Hyrum Smith initially wrote “the commandments of the Lord”; then he immediately crossed out the Lord and wrote God inline. It is also possible to interpret the correction in 𝓟 as indicating that Hyrum Smith initially wrote the Lord God and then almost immediately crossed out the Lord (there is no change in the level of ink flow). Of course, three readings are possible here: the Lord, God, and the Lord God. The critical text will follow the corrected reading in 𝓟. For other instances of this kind of error in the manuscripts, see under 1 Nephi 3:21 and Mosiah 1:4.
Summary: Maintain in Mosiah 29:11 the corrected reading in 𝓟, “the commandments of God”.