the data in the database is not changed, but is not longer accessable thru the base form
LO4.1 base gives wrong dates when connected to mysql database, all dates swich to 1/1/1800 or 1/1/2200 what happend?
I suggest to report a bug report to bugtracker: https://www.libreoffice.org/get-help/bug/?LOversion=188.8.131.52
In bugtracker write exact version of software you are using and OS. In titlebar write down
[REGRESSION: Your title]
It would be helpful if you give some example. E.g. create table with few rows. And then write what you expect to get and what is the result. Please also report a bug number on this forum if other users have the same problem, to easily find out the info and add comments.