Nidhoggur1993 commented on issue #15481:
URL: https://github.com/apache/airflow/issues/15481#issuecomment-824621735


   > > sqlalchemy.exc.ProgrammingError: 
(mysql.connector.errors.ProgrammingError) 1071 (42000): Specified key was too 
long; max key length is 3072 bytes
   > 
   > You need to change `sql_engine_collation_for_ids` .See: 
http://airflow.apache.org/docs/apache-airflow/stable/howto/set-up-database.html#setting-up-a-mysql-database
   
   Thanks. I changed that to `utf8mb4_general_ci` , it works ;-)


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