migrating to alternative source resets statistics #127

Brief summary

I was reading a 9 hours manhwa, switched to a source that had more chapters, and my read g statistics got reset.
I now have 1 minute reading time on this manhwa (9+ before the migration)
Realized it today only, might have lost dozen of hours since the beginning

Steps to reproduce

Read
Migrate to another source
Statistics for the manhwa got reset

Futon version

9.8.2

Android version

16

Device

OnePlus 8

Acknowledgements

• This is not a duplicate of an existing issue. Please look through the list of open issues before creating a new one.
• This is not an issue with a specific manga source. Otherwise, you have to proceed from parsers repository.