fix a problem in java / jira small app

I have a related task to java spring boot, to jira also, have ETL with the persistence,but not work. the code has integration with Jira using the same approach of the class i shared you. you should try to improve that integration , altought that is the less important thing.... there are 4 main entities (problem, issue, request and improvement)and the other entities are same you found (priority, user) etc persistence not work, i will provide ddl you must validate date formats according document I need that fixed today in next couple hours