At first glance, this would seem to be a rather benign statement about God’s omnipotence. God can create whatever He wants, in whatever degree He wants. But upon further reflection it quickly becomes apparent that in order for God to create the reality that we see around us, He has to obey some very specific rules. Rules that dictate exactly what it is that God can and cannot create. Rules such as the “Law of Noncontradiction” and the “Principle of Sufficient Reason”.
Now strictly speaking God may not be restricted by these rules, but if He wants to create the coherent reality that we see around us, then there are indeed certain rules that He cannot violate. This would seem to severely restrict God’s creative potential.
Even an omnipotent being needs to obey the rules. Which would seem to make Them not quite so omnipotent.