mariadb-10.x : sql-mode Hint - Error 1366 - Incorrect double value: '' for column

vi /etc/my.cnf.d/mariadb-server.cnf 

 

sql-mode=""

#sal_mode=STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

#sal_mode="ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"