Error while trting to enter Working table

[David Sasson]

Hello ,
I have a working DB that save data for 6 months now with out any problem.

today I have try to enter the setting and remove\ add some columbs

but I got this error:

"Error Parsing DLL for sample.DB"
when I enter the "View DLL" , I can see that there is a red line between DEFAULT and (now()):
" `Time_update` datetime NOT NULL DEFAULT (now()), "
again - the DB is working without any problem

what I can do to enter the setting ?

** I'm using mysql workbanch 8 on Windows server 2019

Thanks ,