What does 2 Chronicles 30:7 mean?

'Don’t be stubborn like your ancestors were. Reach out to the Lord and come to his temple, the one he set apart forever. Serve the Lord your God, and he’ll turn his anger away from you.' 2 Chronicles 30:7 - Modern Text Bible

(They urged the people not to repeat the mistakes of the past, but to come back to God and worship him, with the promise that God would show mercy.)