diff --git a/backend/src/services/learning-objects/learning-object-zip-processing-service.ts b/backend/src/services/learning-objects/learning-object-zip-processing-service.ts
index d618fb59..9b9c4d9f 100644
--- a/backend/src/services/learning-objects/learning-object-zip-processing-service.ts
+++ b/backend/src/services/learning-objects/learning-object-zip-processing-service.ts
@@ -69,7 +69,7 @@ function createLearningObject(metadata: LearningObjectMetadata, content: Buffer,
     };
 
     if (!metadata.target_ages || metadata.target_ages.length === 0) {
-        throw new BadRequestException('errorTargetAgesMandatory');
+        throw new BadRequestException('targetAgesMandatory');
     }
 
     const learningObject = learningObjectRepo.create({
diff --git a/package-lock.json b/package-lock.json
index e19744e9..026eda07 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -36,8 +36,6 @@
                 "@mikro-orm/postgresql": "6.4.12",
                 "@mikro-orm/reflection": "6.4.12",
                 "@mikro-orm/sqlite": "6.4.12",
-                "@types/mime-types": "^2.1.4",
-                "@types/unzipper": "^0.10.11",
                 "axios": "^1.8.2",
                 "cors": "^2.8.5",
                 "cross": "^1.0.0",
@@ -68,9 +66,11 @@
                 "@types/express": "^5.0.0",
                 "@types/express-fileupload": "^1.5.1",
                 "@types/js-yaml": "^4.0.9",
+                "@types/mime-types": "^2.1.4",
                 "@types/node": "^22.13.4",
                 "@types/response-time": "^2.3.8",
                 "@types/swagger-ui-express": "^4.1.8",
+                "@types/unzipper": "^0.10.11",
                 "globals": "^15.15.0",
                 "ts-node": "^10.9.2",
                 "tsx": "^4.19.3",
@@ -3117,6 +3117,7 @@
             "version": "2.1.4",
             "resolved": "https://registry.npmjs.org/@types/mime-types/-/mime-types-2.1.4.tgz",
             "integrity": "sha512-lfU4b34HOri+kAY5UheuFMWPDOI+OPceBSHZKp69gEyTL/mmJ4cnU6Y/rlme3UL3GyOn6Y42hyIEw0/q8sWx5w==",
+            "dev": true,
             "license": "MIT"
         },
         "node_modules/@types/ms": {
@@ -3213,6 +3214,7 @@
             "version": "0.10.11",
             "resolved": "https://registry.npmjs.org/@types/unzipper/-/unzipper-0.10.11.tgz",
             "integrity": "sha512-D25im2zjyMCcgL9ag6N46+wbtJBnXIr7SI4zHf9eJD2Dw2tEB5e+p5MYkrxKIVRscs5QV0EhtU9rgXSPx90oJg==",
+            "dev": true,
             "license": "MIT",
             "dependencies": {
                 "@types/node": "*"