In verse 2.9.30, after submitting his questions, Brahma prayed to the Lord that all his work of creation would not give birth to pride. In answer to this, the Lord recommended Him to just follow the conclusion of the four verses, practicing devotional service and fixing his mind unto Him.
“O Brahmā, just follow this conclusion by fixed concentration of mind, and no pride will disturb you, neither in the partial nor in the final devastation.” (SB 2.9.37)
One could question when this conversation of Lord Brahma with Krsna happened. This is actually a difficult question to answer because the focus of the Srimad Bhagavatam is the spiritual instructions and not the historical descriptions. We are currently on the first day of the second half of the life of Brahma. This conversation happened at the very beginning of one of his days, but each one?
Srimad Bhagavatam #17: Srimad Bhagavatam is the answer for all questions