fix: create new budget groups instead of overriding existing ones

Author: Hoverth

src/store/state/utils.ts

@@ -20,11 +20,16 @@ export const generateBudgetYear = (year: number): BudgetYear => ({
 });
 
 export const generateBudgetYearFromCurrent = (year: number, current: BudgetYear): BudgetYear => {
-  function clearValues(value: BudgetGroup) {
+  function clearValues(value: BudgetGroup): BudgetGroup {
+    const newBudgetGroup = {
+      name: value.name,
+      id: uuid(),
+      budgets: []
+    };
     for (const budget of value.budgets) {
-      budget.values = new Array(12).fill(0);
+      newBudgetGroup.budgets.push(generateBudget(budget.name));
     }
-    return value;
+    return newBudgetGroup;
   }
 
   return {