Update index when updating resources.

server/utils/slice.go

@@ -0,0 +1,13 @@
+package utils
+
+func RemoveDuplicate[T comparable](slice []T) []T {
+	seen := make(map[T]struct{})
+	var result []T
+	for _, v := range slice {
+		if _, ok := seen[v]; !ok {
+			seen[v] = struct{}{}
+			result = append(result, v)
+		}
+	}
+	return result
+}