diff --git a/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java b/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java
index 42cfc284..d15dedf7 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/recording/Recording.java
@@ -191,7 +191,7 @@ public class Recording {
 		this.hasVideo = hasVideo;
 	}
 
-	public JsonObject toJson() {
+	public JsonObject toJson(boolean withUniqueSessionId) {
 		JsonObject json = new JsonObject();
 		json.addProperty("id", this.id);
 		json.addProperty("object", "recording");
@@ -205,7 +205,9 @@ public class Recording {
 			}
 		}
 		json.addProperty("sessionId", this.sessionId);
-		json.addProperty("uniqueSessionId", this.uniqueSessionId);
+		if (withUniqueSessionId) {
+			json.addProperty("uniqueSessionId", this.uniqueSessionId);
+		}
 		json.addProperty("createdAt", this.createdAt);
 		json.addProperty("size", this.size);
 		json.addProperty("duration", this.duration);
diff --git a/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedQuickStartRecordingService.java b/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedQuickStartRecordingService.java
index ed0c55c1..0c747c2a 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedQuickStartRecordingService.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedQuickStartRecordingService.java
@@ -79,7 +79,7 @@ public class ComposedQuickStartRecordingService extends ComposedRecordingService
 		envs.add("VIDEO_ID=" + recording.getId());
 		envs.add("VIDEO_NAME=" + properties.name());
 		envs.add("VIDEO_FORMAT=mp4");
-		envs.add("RECORDING_JSON='" + recording.toJson().toString() + "'");
+		envs.add("RECORDING_JSON='" + recording.toJson(true).toString() + "'");
 
 		String containerId = this.sessionsContainers.get(session.getSessionId());
 		try {
diff --git a/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedRecordingService.java b/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedRecordingService.java
index f5566566..441cb6d7 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedRecordingService.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/recording/service/ComposedRecordingService.java
@@ -157,9 +157,9 @@ public class ComposedRecordingService extends RecordingService {
 		envs.add("VIDEO_ID=" + recording.getId());
 		envs.add("VIDEO_NAME=" + properties.name());
 		envs.add("VIDEO_FORMAT=mp4");
-		envs.add("RECORDING_JSON=" + recording.toJson().toString());
+		envs.add("RECORDING_JSON=" + recording.toJson(true).toString());
 
-		log.info(recording.toJson().toString());
+		log.info(recording.toJson(true).toString());
 		log.info("Recorder connecting to url {}", layoutUrl);
 
 		String containerId;
diff --git a/openvidu-server/src/main/java/io/openvidu/server/recording/service/RecordingService.java b/openvidu-server/src/main/java/io/openvidu/server/recording/service/RecordingService.java
index 4076532c..aa04cef2 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/recording/service/RecordingService.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/recording/service/RecordingService.java
@@ -90,7 +90,7 @@ public abstract class RecordingService {
 
 		String filePath = this.openviduConfig.getOpenViduRecordingPath() + recording.getId() + "/"
 				+ RecordingService.RECORDING_ENTITY_FILE + recording.getId();
-		String text = recording.toJson().toString();
+		String text = recording.toJson(true).toString();
 		this.fileManager.createAndWriteFile(filePath, text);
 		log.info("Generated recording metadata file at {}", filePath);
 	}
@@ -139,7 +139,7 @@ public abstract class RecordingService {
 		recording.setSize(size); // Size in bytes
 		recording.setDuration(duration > 0 ? duration : 0); // Duration in seconds
 
-		if (this.fileManager.overwriteFile(metadataFilePath, recording.toJson().toString())) {
+		if (this.fileManager.overwriteFile(metadataFilePath, recording.toJson(true).toString())) {
 			log.info("Sealed recording metadata file at {} with status [{}]", metadataFilePath, status.name());
 		}
 
diff --git a/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java b/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java
index dbacc3ad..d6ea6ee5 100644
--- a/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java
+++ b/openvidu-server/src/main/java/io/openvidu/server/rest/SessionRestController.java
@@ -377,7 +377,7 @@ public class SessionRestController {
 
 		try {
 			Recording startedRecording = this.recordingManager.startRecording(session, recordingProperties);
-			return new ResponseEntity<>(startedRecording.toJson().toString(), RestUtils.getResponseHeaders(),
+			return new ResponseEntity<>(startedRecording.toJson(false).toString(), RestUtils.getResponseHeaders(),
 					HttpStatus.OK);
 		} catch (OpenViduException e) {
 			HttpStatus status = e.getCodeValue() == Code.MEDIA_NODE_STATUS_WRONG.getValue()
@@ -431,7 +431,7 @@ public class SessionRestController {
 					session.getParticipantByPublicId(ProtocolElements.RECORDER_PARTICIPANT_PUBLICID), null, null, null);
 		}
 
-		return new ResponseEntity<>(stoppedRecording.toJson().toString(), RestUtils.getResponseHeaders(),
+		return new ResponseEntity<>(stoppedRecording.toJson(false).toString(), RestUtils.getResponseHeaders(),
 				HttpStatus.OK);
 	}
 
@@ -451,7 +451,8 @@ public class SessionRestController {
 					&& recordingManager.getStartingRecording(recording.getId()) != null) {
 				recording.setStatus(io.openvidu.java.client.Recording.Status.starting);
 			}
-			return new ResponseEntity<>(recording.toJson().toString(), RestUtils.getResponseHeaders(), HttpStatus.OK);
+			return new ResponseEntity<>(recording.toJson(false).toString(), RestUtils.getResponseHeaders(),
+					HttpStatus.OK);
 		} catch (Exception e) {
 			return new ResponseEntity<>(HttpStatus.NOT_FOUND);
 		}
@@ -475,7 +476,7 @@ public class SessionRestController {
 					&& recordingManager.getStartingRecording(rec.getId()) != null) {
 				rec.setStatus(io.openvidu.java.client.Recording.Status.starting);
 			}
-			jsonArray.add(rec.toJson());
+			jsonArray.add(rec.toJson(false));
 		});
 		json.addProperty("count", recordings.size());
 		json.add("items", jsonArray);