Let me describe the scenario.

Using JPA and hibernate with Spring boot appplication.

Step 1. jpa.hibernate.ddl-auto = create
It successfully creates the tables with respects to entity mapped with it. So it is working fine.

Step 2. Now I changed the status of jpa.hibernate.ddl-auto = update
AND changed one attribute name, suppose earlier it was like String gender now I changed it to String sex.

+Now after updation, It seems there are two columns in my user table. One is gender and another one is sex. Now my entity - table is not totally mapped with each other.
+