this time for sure

15 But the Israelites said to the LORD, "We have sinned. Do with us whatever you think best, but please rescue us now." 16 Then they got rid of the foreign gods among them and served the LORD. And he could bear Israel's misery no longer.
Judges 10:15-16

It's hard to be forgiven for what you did if you are still doing it. Isreal realizes they have sinned, and then they make an active effort to stop sinning and serve God again. God forgives, but only when we turn away from our evil ways and follow Him.