check on groupmanagement-schema; in thinktogether-schema cat YES group No

groupManagement/src/main/java/thinkTogether/groupManagement/model/Group.java

@@ -5,7 +5,7 @@ import java.sql.Date;
 
 @Entity
 public class Group {
-
+    @Id
     private Long id;
 
     private String status;

groupManagement/src/main/resources/application.properties

-spring.datasource.url=jdbc:mariadb://thinktogether.mariadb.database.azure.com:3306/playground
+spring.datasource.url=jdbc:mariadb://thinktogether.mariadb.database.azure.com:3306/groupmanagement
 spring.datasource.username=Nachtkind
 spring.datasource.password=!13072020VerteilteSysteme
 spring.jpa.show-sql=true