fixed the biller Id Saving problem added 404 not found url

src/main/java/com/billpaymentservice/bbps/entites/Group.java

@@ -2,10 +2,13 @@ package com.billpaymentservice.bbps.entites;
 
 
 import java.util.List;
+import jakarta.persistence.ForeignKey;
+
 
 import jakarta.persistence.CascadeType;
 import jakarta.persistence.CollectionTable;
 import jakarta.persistence.Column;
+import jakarta.persistence.ConstraintMode;
 import jakarta.persistence.ElementCollection;
 import jakarta.persistence.Entity;
 import jakarta.persistence.FetchType;
@@ -36,10 +39,11 @@ public class Group {
     @Column(name = "input")
     private String input;
 
-    // Example: "Admission No/Application No/GR No" → stored as multiple params
-    @ElementCollection
-    @CollectionTable(name = "group_params", joinColumns = @JoinColumn(name = "group_id"))
-    @Column(name = "param_name")
+    @CollectionTable(
+    	    name = "group_params",
+    	    joinColumns = @JoinColumn(name = "group_id"),
+    	    foreignKey = @ForeignKey(value = ConstraintMode.NO_CONSTRAINT)
+    	)
     private List<String> params;
 
     // 🔗 Parent group relationship (for nested groups)