"For you don’t delight in sacrifice" (51:16), and then, "you will delight in the sacrifices of righteousness" (51:19). Which is it?

The psalm says both, with one Hebrew verb for delight, chafets (tap delight). First: "For you don’t delight in sacrifice, or else I would give it. You have no pleasure in burnt offering" (51:16), and "The sacrifices of God are a broken spirit. O God, you will not despise a broken and contrite heart" (51:17). Then comes a prayer for the city: "Do well in your good pleasure to Zion. Build the walls of Jerusalem" (51:18). And last: "Then you will delight in the sacrifices of righteousness, in burnt offerings and in whole burnt offerings. Then they will offer bulls on your altar" (51:19). Burnt offering in 51:16 and burnt offerings in 51:19 are one Hebrew word too. The psalm doesn't explain its Then beyond the verses before it. Psalm 4's notes set "the sacrifices of righteousness" beside Deuteronomy 33:19, and Psalm 40's notes set 51:16-17 beside other passages on sacrifice; these notes don't repeat them. The verses stand side by side in the psalm, and these notes don't choose how they fit together.