NET

6 He must not be a recent convert or he may become arrogant and fall into the punishment that the devil will exact.

Darby

6 not a novice, that he may not, being inflated, fall into [the] fault^D8860 of the devil.

Darby Bible Notes

fault - Krima is the subject-matter of which a person had to be accused. They set up the krima of the Lord on the cross; that for which he came into accusation – the charge. So it is used here. The devil was puffed up with his own excellency, and abode not in the truth. Hence, in a strongly taken sense, our word 'crime.' See also Note on 1Cor. 11.29.

KJV

6 Not a novice^K7111, lest being lifted up with pride he fall into the condemnation of the devil.

KJV Bible Notes

a novice: Or, one newly come to the faith.