When this problem occurs in MySQL database:

Error Code: 1175. You are using safe update mode and you tried to update a table without a
WHERE  that uses a KEY column To disable safe mode, toggle the option in Preferences -> SQL 
Editor and reconnect.

MySQL has entered the safe mode, which is the safe updates mode

Solution:

SHOW VARIABLES like 'sql_safe_updates';  # Query the status of the current safe-updates mode
SET sql_safe_updates=0; # Turn off safe-updates mode