Contradiction with Genesis 6:6
This verse shows God's regret in creating humanity, contradicting the enduring joy in creation expressed in Psalms 104:31.
Genesis 6:6: And it repented the LORD that he had made man on the earth, and it grieved him at his heart.
Contradiction with Exodus 32:14
Here, the Lord repents of His intentions, which contrasts with the unchanging rejoicing in His works in Psalms 104:31.
Exodus 32:14: And the LORD repented of the evil which he thought to do unto his people.
Contradiction with Isaiah 53:10
This verse speaks of God's will to bruise His servant, which contradicts the idea of God taking pleasure in His creation.
Isaiah 53:10: Yet it pleased the LORD to bruise him; he hath put [him] to grief: when thou shalt make his soul an offering for sin, he shall see [his] seed, he shall prolong [his] days, and the pleasure of the LORD shall prosper in his hand. [thou...: or, his soul shall make an offering]
Contradiction with Jeremiah 18:10
God speaks of repenting from good if His commandments are not followed, contrasting with the consistent delight implied in Psalms 104:31.
Jeremiah 18:10: If it do evil in my sight, that it obey not my voice, then I will repent of the good, wherewith I said I would benefit them.
Contradiction with Jonah 3:10
God repents of the evil He planned for Nineveh, showing change in His plans unlike the steadfast joy in creation in Psalms 104:31.
Jonah 3:10: And God saw their works, that they turned from their evil way; and God repented of the evil, that he had said that he would do unto them; and he did [it] not.
Contradiction with 1 Samuel 15:11
God expresses regret over making Saul king, which contradicts the sense of satisfaction in His works as expressed in Psalms 104:31.
1 Samuel 15:11: It repenteth me that I have set up Saul [to be] king: for he is turned back from following me, and hath not performed my commandments. And it grieved Samuel; and he cried unto the LORD all night.