diff --git a/src/utils/ai.detection.ts b/src/utils/ai.detection.ts
index fe5e1788..56020fab 100644
--- a/src/utils/ai.detection.ts
+++ b/src/utils/ai.detection.ts
@@ -1,7 +1,7 @@
 import { UserSolution } from "@/interfaces/exam";
 export default function ai_usage(solutions: UserSolution[]): number {
     return solutions.reduce((max, solution) => {
-        if (solution.type == "writing") {
+        if (solution.type == "writing" && solution && solution.solutions[0] && solution.solutions[0].evaluation && solution.solutions[0].evaluation.ai_detection) {
             const aiUse = solution.solutions[0].evaluation?.ai_detection?.class_probabilities["ai"];
             return aiUse !== undefined ? Math.max(max, aiUse) : max;
         } else {