Bug?: New FSRS 6 parameters not appearing after reoptimizing

Anki FSRS
1

A few days ago, I updated to Anki 25.07 to try out the new FSRS 6. So after updating, I went to my decks settings and clicked optimize. However, I noticed that after optimizing, there where still only 19 parameters even though FSRS 6 now has 21. Also, restarting Anki did not make the parameters appear. What I needed to do is to first reset the parameters and then optimize for the additional parameters to be computed. I am unsure whether the other 19 parameters where proper FSRS 6 parameters. I had this issue with both of my decks.

Is this intended behaviour? If so, where is it comunicated that this is a step that needs to be taken?

2

Disable the health check tick box and do you get the text “Your FSRS parameters are already optimal“?

3

I made a pr in case it is this.

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4

Yes I do. When I do tick the box, this text does not appear.

However, this changes nothing about the missing parameters, so I think this is unrelated to the issue?

5

This means that FSRS 5 is outperforming FSRS 6 for that preset. If you want to use FSRS 6 anyway, clear your existing parameters before hitting optimize.

6

Oh, I didn’t know that Anki only updates the FSRS version when it actually performs better. So, if I already updated to FSRS 6, can I just copy the old FSRS 5 parameters into the field and then Anki will revert to FSRS 5?

7

Yep .

8

Awesome. Well then, thanks for helping!

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