Should I continue my Piano Sonata numbering or start it anew?

As I have been working on a piano sonata lately, I realized that I have attempted to write a piano sonata 5 times before and only one ever got finished, that one being Piano Sonata no. 4 that I wrote for Mozart’s birthday in 2019. Most of these sonatas were doomed from the start, too much resemblance to K 545 that wasn’t done on purpose. The only one besides my fourth that really had any potential to be more than just a slightly tweaked Mozart sonata without the intention of such, was my third one in C minor. Unfortunately, with the 2020 tragedy of my older computer becoming unusable mid-update and my dad either forgetting to recover my compositions or not being able to(I’d rather think of the former), I lost a lot of my compositions entirely and lots more went into obscurity. My third piano sonata unfortunately fell into the former group. 

My second and fifth sonatas fell into obscurity, but since they are basically a structural duplicate of Mozart with slight tweaking, I have kept them in obscurity. My first sonata was completely lost and I don’t feel so bad about it because again, Mozart duplicate. But this brings me into a conundrum with this sonata I am composing right now and how I should number it. I will go over both options here.

Option 1: Continue the numbering 

With this option, I would number my piano sonata as such:

Piano Sonata no. 6 in C minor "Sonata al Reverso"

On the one hand, this makes sense. Sixth attempt at a piano sonata naturally gets numbered as no. 6. However, I don’t know if this is best since no’s 1, 2, 3, and 5 are all unfinished and will probably remain as such. Would it really make sense given that to still number the sonata I am working on as my sixth? I get that there are pieces that remain unfinished and the composer composes more after that and the numbering continues as though it was finished. Schubert’s symphonies are a good example of that. But does it really make sense in my case with my 4 unfinished piano sonatas? I’m not so sure.

Option 2: Start the numbering anew

To make it clear, my Piano Sonata no. 4 would remain as such because it was finished before my older computer became unusable and it was my fourth attempt at the piano sonata. But the sonatas that I compose after that would be numbered as though my unfinished sonatas didn’t exist in the first place. So the sonata I am composing right now would be numbered as such:

Piano Sonata no. 1 in C minor "Sonata al Reverso"

This too makes some sense. There are plenty of examples where later works get lower numbers, both in opus and in numberings like "Piano Sonata no. x". Mozart’s Piano Sonata in Bb K 333, Shostakovich’s Symphony no. 5, and Chopin’s Nocturne in E minor Op. 72 no. 1 are all examples of this kind of thing happening. But this makes things more complicated when talking about my piano sonatas as by Piano Sonata no. 1, I could be referring to my first attempt at such a work overall, which is unfinished and will stay that way, or I could be referring to my C minor "Sonata al Reverso" piano sonata. Is it really a good idea to add this complication by numbering the sonata I am currently working on as Piano Sonata no. 1?

I don’t know, I’m so unsure of what to do. Any input on which option I should do and why would be helpful.

I only bother to really name (and number) finished pieces. I think this helps greatly avoid the kind of problem you're having. Plus who cares what number it is? It could as well reflect the date of completion, and if it never gets completed, it never gets a number. End of story lol.