Retirement tax questions

Ok. I will use my years tax return as an example. I'm filing for 2024. For box 12, d codes can't be duplicates. They each have their own money values and so it feels necessary to find a way to keep d 23 and d code for 2024. We know what 23 means- just indicates the year 2023. And we know there is no drop down option for d 23. We can only add more d codes, but no duplicates.

Some are saying just combine and opposing is saying dont combine. Instead of running around in circles- if you decide not to combine what does that mean? If you do combine them, what does that mean? Are there consequences to either choice? Nobody is answering thuroughly and it's creating more confusion.