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... my website is used for internal employees. The requirements for security are not very high. ...
I do not think that either your fellow Employees or your company as a whole would appreciate such a "cavalier" attitude to their Data.
Just because you're "only" on an internal network
does not mean that you can just "forget" about Data Security.
"skip grants" is there for
emergencies only.
It's so that you can get in and clean up the mess that somebody (or something) else made.
You
must not be running
any Application using this option.
If you are, it means that your database is security is
non-existent and needs to be corrected. Urgently.
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Is there any way to solve this problem by modifying the settings?
Short answer - No.
MySQL has [quite rightly] decided that this is a highly dangerous practice and has "slammed the door" on it.
[Get the Developers to] Fix the Application so that it works with database security instead of trying to ignore it.
Regards, Phill W.