Deductions & credits

I originally claimed a deduction on my 2017 return for the small amount of repairs that I was told about and had performed in 2017. Substantially more damage was discovered in 2019 by a professional contractor. So, would it be best to amend my 2017 return? Alternatively, could the damage discovered in 2019 serve as a deduction on my 2019 return? Thanks for your help!