diff --git a/src/main/java/com/solit/sync2sing/domain/training/common/controller/TrainingController.java b/src/main/java/com/solit/sync2sing/domain/training/common/controller/TrainingController.java
index d056467..6a8ee83 100644
--- a/src/main/java/com/solit/sync2sing/domain/training/common/controller/TrainingController.java
+++ b/src/main/java/com/solit/sync2sing/domain/training/common/controller/TrainingController.java
@@ -69,18 +69,23 @@ public ResponseEntity<ResponseDTO> generateVocalAnalysisReport(
             @RequestPart(value = "vocal_file") MultipartFile vocalFile,
             @RequestPart(value = "data") GenerateVocalAnalysisReportRequest request
     ) {
+        Long userId;
         if (!request.getAnalysisType().equals("GUEST") && userDetails == null) {
             throw new ResponseStatusException(
                     ResponseCode.UNAUTHORIZED.getStatus(),
                     ResponseCode.UNAUTHORIZED.getMessage()
             );
+        } else if (request.getAnalysisType().equals("GUEST")) {
+            userId = null;
+        } else {
+            userId = userDetails.getId();
         }
 
         return ResponseEntity
             .status(HttpStatus.CREATED)
             .body(new ResponseDTO(
                 ResponseCode.VOCAL_ANALYSIS_REPORT_CREATED,
-                trainingService.generateVocalAnalysisReport(userDetails.getId(), vocalFile, request)
+                trainingService.generateVocalAnalysisReport(userId, vocalFile, request)
             ));
     }