diff --git a/models/backbeatRoutes/putMetadata.smithy b/models/backbeatRoutes/putMetadata.smithy
index 2aa181d9..0fa517c1 100644
--- a/models/backbeatRoutes/putMetadata.smithy
+++ b/models/backbeatRoutes/putMetadata.smithy
@@ -4,7 +4,8 @@ namespace cloudserver.backbeatRoutes
 @http(method: "PUT", uri: "/_/backbeat/metadata/{Bucket}/{Key+}")
 operation PutMetadata {
     input: PutMetadataInput,
-    output: PutMetadataOutput
+    output: PutMetadataOutput,
+    errors: [StaleMicroVersionIdException]
 }
 
 structure PutMetadataInput {
@@ -33,12 +34,25 @@ structure PutMetadataInput {
     
     @httpHeader("X-Scal-Request-Uids")
     RequestUids: String,
-    
+
+    @httpHeader("x-scal-micro-version-id")
+    MicroVersionId: String,
+
     @httpPayload
     Body: Blob
 }
 
 structure PutMetadataOutput {
     /// Version ID of the stored metadata
-    versionId: String
+    versionId: String,
+
+    @httpHeader("x-scal-replication-loop")
+    ReplicationLoop: Boolean
+}
+
+@error("client")
+@httpError(409)
+structure StaleMicroVersionIdException {
+    @required
+    message: String
 }
\ No newline at end of file
diff --git a/models/backbeatRoutes/putdata.smithy b/models/backbeatRoutes/putdata.smithy
index 45e45780..8368cbe8 100644
--- a/models/backbeatRoutes/putdata.smithy
+++ b/models/backbeatRoutes/putdata.smithy
@@ -7,7 +7,8 @@ use aws.auth#unsignedPayload
 @unsignedPayload
 operation PutData {
     input: PutDataInput,
-    output: PutDataOutput
+    output: PutDataOutput,
+    errors: [VersionIdCollisionException]
 }
 
 structure PutDataInput {
@@ -31,6 +32,9 @@ structure PutDataInput {
     @httpHeader("X-Scal-Request-Uids")
     RequestUids: String,
 
+    @httpHeader("x-scal-source-version-id")
+    SourceVersionId: String,
+
     @httpPayload
     @default("")
     Body: StreamingBlob
@@ -45,7 +49,17 @@ structure PutDataOutput {
 
     @httpHeader("x-amz-server-side-encryption-customer-algorithm")
     SSECustomerAlgorithm: String,
-    
+
     @httpHeader("x-amz-server-side-encryption-aws-kms-key-id")
     SSEKMSKeyId: String
+}
+
+@error("client")
+@httpError(409)
+structure VersionIdCollisionException {
+    @required
+    message: String,
+
+    @httpHeader("x-scal-micro-version-id")
+    MicroVersionId: String
 }
\ No newline at end of file
diff --git a/package.json b/package.json
index ae3075ec..bdee3da1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@scality/cloudserverclient",
-  "version": "1.0.8",
+  "version": "1.0.9",
   "engines": {
     "node": ">=20"
   },