Have been contributing to a Roth all year but now may be over the salary limit due to overtime?

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I didn't think I would be working anywhere near the hours that I have been this year, and now I may end up over the the salary limit for a single filer for a Roth IRA, but I have been making month contributions all year. What happens if I end up going over the salary limit but have been contributing all year?

Additional Details

*I have been making monthly contributions all year

Have been contributing to a Roth all year but now may be over the salary limit due to overtime?