My website suddenly has a mysql error. Does anyone have the same error?

My website suddenly has this error and it has been running normally. I think it should be a problem with the mysql configuration file, not my code, right? Because I haven’t changed the code for half a month.

Error is as follows:

Error Number: 1231

Variable ‘sql_mode’ can’t be set to the value of ‘REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE( @@sql_mode

select count(*) from article

Filename: models/Home_model.php

Line Number: 13


Why is there such a mistake, who can give me an explanation?