FMV of ALL IRA's form 8606

I received a letter stating I need to take an RMD this coming year.  I did not remember this IRA.  Does the FMV for this IRA  need to by included on Line 6 for 2024?  (Line 6 says ALL IRAs)  I have only been reporting the FMV on form 8606 from the IRA that I am receiving distributions. Have I been doing this wrong?  Is so do I have to go back 10 years (or longer and amend? I did not make any contributions in 2024