What is the context of Psalms 89:48-49?

• A Commitment to Persevere (Psalms 89:38-52 true)
• I Will Sing of the Steadfast Love of the Lord (Psalms 89:1-52 true)
• Remembering the Covenant with David, and Sorrow for Lost Blessings (Psalms 89:1-52 true)
• The Lord’s Covenant with David, and Israel’s Afflictions. (Psalms 89:1-52 true)
• Psalm 89 .[ a .] (Psalms 89:1-52 true)
• Perplexity about God’s Promises (Psalms 89:1-52 true)