installation problem galaxy mysql mariadb



i’m installing galaxy on centos7
i have this problem now.
OperationalError: (_mysql_exceptions.OperationalError) (1553, “Cannot drop index ‘ix_workflow_step_connection_output_step_id’: needed in a foreign key constraint”) [SQL: u’\nDROP INDEX ix_workflow_step_connection_output_step_id ON workflow_step_connection’] (Background on this error at:


If you have the option we heavily recommend using postgres instead of mysql/mariadb. This is possibly similar to issues described here: