Migration Database MSSQL to MySQL

For days I have been trying to migrate a database (MSSQL to MySQL) using ODBC Datasource Administrator unfortunately this is not successful I get error 1822 "Missing index for constraint". I'm just doing it as an exercise, it's not a business project. I wanted to know if anyone here could help me with this. I also tried with AWS the problem is the same (constraints), it doesn't work.