Your footage is at 24 fps, your audio is at either 29.97 or 30fps. professional post studios call it pull up or drop back. There is no good way to fix it. Pull up and Drop back only line up the audio so that it will finish when the footage finishes, but that means that more things will probably be even more out of sync than just going in and manually editing. If this is the case then your audio should get gradually more and more out of sync as the footage rolls on. If it doesn’t get increasingly out of sync as you watch it then it’s something else. good luck babb.
brt