Wrong data in cards history

Anki Help
1

I have changed desired retention and rescheduled cards several times to adjust my retention. Each card got new entries to its history. It led to a situation that the last three entries of my cards history are wrong. The history shows 6.88y, 6.92y and 6.46y while the actual interval was 5.45y.

redundant_history
redundant_history1080×2137 305 KB

After I reviewed the card, it got a new entry and a new interval. It means, the information that the real interval was 5.45y was lost. (the interval was 5.45y as it is difference between 2021-06-02 and 2026-11-13). The card was not late.

lost_interval
lost_interval1080×2123 309 KB

Therefore, it would be good, if a card is rescheduled, the interval in the last entry would change only. See the picture below.

interval_change
interval_change1080×2149 278 KB

In this case, after the next review, the history would be clean and correct.

clean_history
clean_history1080×2132 306 KB

Second problem is that each entry added because of rescheduling increase size of the collection.

2

Rescheduling the card doesn’t and shouldn’t change what was entered in the revlog at the time that review was done. You’re using FSRS, so the length of the interval isn’t used for anything in the future.

That’s the reason for the warning you’re given that you shouldn’t use that feature any more than sparingly. If you want to avoid that, you can reschedule with the FSRS Helper add-on instead.