diff --git a/dump/src/reader/compat/v5_to_v6.rs b/dump/src/reader/compat/v5_to_v6.rs
index e9e1b659b..237381414 100644
--- a/dump/src/reader/compat/v5_to_v6.rs
+++ b/dump/src/reader/compat/v5_to_v6.rs
@@ -292,14 +292,14 @@ impl From<v5::ResponseError> for v6::ResponseError {
             "malformed_payload" => v6::Code::MalformedPayload,
             "missing_payload" => v6::Code::MissingPayload,
             "api_key_not_found" => v6::Code::ApiKeyNotFound,
-            "missing_parameter" => v6::Code::UnretrievableErrorCode,
+            "missing_parameter" => v6::Code::BadRequest,
             "invalid_api_key_actions" => v6::Code::InvalidApiKeyActions,
             "invalid_api_key_indexes" => v6::Code::InvalidApiKeyIndexes,
             "invalid_api_key_expires_at" => v6::Code::InvalidApiKeyExpiresAt,
             "invalid_api_key_description" => v6::Code::InvalidApiKeyDescription,
             "invalid_api_key_name" => v6::Code::InvalidApiKeyName,
             "invalid_api_key_uid" => v6::Code::InvalidApiKeyUid,
-            "immutable_field" => v6::Code::ImmutableField,
+            "immutable_field" => v6::Code::BadRequest,
             "api_key_already_exists" => v6::Code::ApiKeyAlreadyExists,
             other => {
                 log::warn!("Unknown error code {}", other);
diff --git a/meilisearch-types/src/error.rs b/meilisearch-types/src/error.rs
index b4a8b786e..bc29f9e82 100644
--- a/meilisearch-types/src/error.rs
+++ b/meilisearch-types/src/error.rs
@@ -181,7 +181,19 @@ DumpAlreadyProcessing                 , invalid       , CONFLICT;
 DumpNotFound                          , invalid       , NOT_FOUND;
 DumpProcessFailed                     , internal      , INTERNAL_SERVER_ERROR;
 DuplicateIndexFound                   , invalid       , BAD_REQUEST;
-ImmutableField                        , invalid       , BAD_REQUEST;
+
+ImmutableApiKeyUid                    , invalid       , BAD_REQUEST;
+ImmutableApiKeyKey                    , invalid       , BAD_REQUEST;
+ImmutableApiKeyActions                , invalid       , BAD_REQUEST;
+ImmutableApiKeyIndexes                , invalid       , BAD_REQUEST;
+ImmutableApiKeyExpiresAt              , invalid       , BAD_REQUEST;
+ImmutableApiKeyCreatedAt              , invalid       , BAD_REQUEST;
+ImmutableApiKeyUpdatedAt              , invalid       , BAD_REQUEST;
+
+ImmutableIndexUid                     , invalid       , BAD_REQUEST;
+ImmutableIndexCreatedAt               , invalid       , BAD_REQUEST;
+ImmutableIndexUpdatedAt               , invalid       , BAD_REQUEST;
+
 IndexAlreadyExists                    , invalid       , CONFLICT ;
 IndexCreationFailed                   , internal      , INTERNAL_SERVER_ERROR;
 IndexNotFound                         , invalid       , NOT_FOUND;
diff --git a/meilisearch-types/src/keys.rs b/meilisearch-types/src/keys.rs
index 00d1a33eb..b41bb06b6 100644
--- a/meilisearch-types/src/keys.rs
+++ b/meilisearch-types/src/keys.rs
@@ -80,12 +80,12 @@ fn deny_immutable_fields_api_key(
     ));
 
     error.code = match field {
-        "uid" => Code::ImmutableField,
-        "actions" => Code::ImmutableField,
-        "indexes" => Code::ImmutableField,
-        "expiresAt" => Code::ImmutableField,
-        "createdAt" => Code::ImmutableField,
-        "updatedAt" => Code::ImmutableField,
+        "uid" => Code::ImmutableApiKeyUid,
+        "actions" => Code::ImmutableApiKeyActions,
+        "indexes" => Code::ImmutableApiKeyIndexes,
+        "expiresAt" => Code::ImmutableApiKeyExpiresAt,
+        "createdAt" => Code::ImmutableApiKeyCreatedAt,
+        "updatedAt" => Code::ImmutableApiKeyUpdatedAt,
         _ => Code::BadRequest,
     };
     error
diff --git a/meilisearch/src/routes/indexes/mod.rs b/meilisearch/src/routes/indexes/mod.rs
index 19a4dfa6c..7a3a97c1f 100644
--- a/meilisearch/src/routes/indexes/mod.rs
+++ b/meilisearch/src/routes/indexes/mod.rs
@@ -1,10 +1,12 @@
+use std::convert::Infallible;
+
 use actix_web::web::Data;
 use actix_web::{web, HttpRequest, HttpResponse};
-use deserr::DeserializeFromValue;
+use deserr::{DeserializeError, DeserializeFromValue, ValuePointerRef};
 use index_scheduler::IndexScheduler;
 use log::debug;
 use meilisearch_types::error::deserr_codes::*;
-use meilisearch_types::error::{DeserrError, ResponseError, TakeErrorMessage};
+use meilisearch_types::error::{unwrap_any, Code, DeserrError, ResponseError, TakeErrorMessage};
 use meilisearch_types::index_uid::IndexUid;
 use meilisearch_types::milli::{self, FieldDistribution, Index};
 use meilisearch_types::tasks::KindWithContent;
@@ -140,8 +142,27 @@ pub async fn create_index(
     }
 }
 
+fn deny_immutable_fields_index(
+    field: &str,
+    accepted: &[&str],
+    location: ValuePointerRef,
+) -> DeserrError {
+    let mut error = unwrap_any(DeserrError::<BadRequest>::error::<Infallible>(
+        None,
+        deserr::ErrorKind::UnknownKey { key: field, accepted },
+        location,
+    ));
+
+    error.code = match field {
+        "uid" => Code::ImmutableIndexUid,
+        "createdAt" => Code::ImmutableIndexCreatedAt,
+        "updatedAt" => Code::ImmutableIndexUpdatedAt,
+        _ => Code::BadRequest,
+    };
+    error
+}
 #[derive(DeserializeFromValue, Debug)]
-#[deserr(error = DeserrError, rename_all = camelCase, deny_unknown_fields)]
+#[deserr(error = DeserrError, rename_all = camelCase, deny_unknown_fields = deny_immutable_fields_index)]
 pub struct UpdateIndexRequest {
     #[deserr(error = DeserrError<InvalidIndexPrimaryKey>)]
     primary_key: Option<String>,
diff --git a/meilisearch/tests/auth/api_keys.rs b/meilisearch/tests/auth/api_keys.rs
index 485d1b551..0a14107a8 100644
--- a/meilisearch/tests/auth/api_keys.rs
+++ b/meilisearch/tests/auth/api_keys.rs
@@ -1404,9 +1404,9 @@ async fn error_patch_api_key_indexes() {
     meili_snap::snapshot!(meili_snap::json_string!(response, { ".createdAt" => "[ignored]", ".updatedAt" => "[ignored]" }), @r###"
     {
       "message": "Json deserialize error: unknown field `indexes`, expected one of `description`, `name` at ``.",
-      "code": "immutable_field",
+      "code": "immutable_api_key_indexes",
       "type": "invalid_request",
-      "link": "https://docs.meilisearch.com/errors#immutable-field"
+      "link": "https://docs.meilisearch.com/errors#immutable-api-key-indexes"
     }
     "###);
     meili_snap::snapshot!(code, @"400 Bad Request");
@@ -1481,9 +1481,9 @@ async fn error_patch_api_key_actions() {
     meili_snap::snapshot!(meili_snap::json_string!(response, { ".createdAt" => "[ignored]", ".updatedAt" => "[ignored]" }), @r###"
     {
       "message": "Json deserialize error: unknown field `actions`, expected one of `description`, `name` at ``.",
-      "code": "immutable_field",
+      "code": "immutable_api_key_actions",
       "type": "invalid_request",
-      "link": "https://docs.meilisearch.com/errors#immutable-field"
+      "link": "https://docs.meilisearch.com/errors#immutable-api-key-actions"
     }
     "###);
     meili_snap::snapshot!(code, @"400 Bad Request");
@@ -1550,9 +1550,9 @@ async fn error_patch_api_key_expiration_date() {
     meili_snap::snapshot!(meili_snap::json_string!(response, { ".createdAt" => "[ignored]", ".updatedAt" => "[ignored]" }), @r###"
     {
       "message": "Json deserialize error: unknown field `expiresAt`, expected one of `description`, `name` at ``.",
-      "code": "immutable_field",
+      "code": "immutable_api_key_expires_at",
       "type": "invalid_request",
-      "link": "https://docs.meilisearch.com/errors#immutable-field"
+      "link": "https://docs.meilisearch.com/errors#immutable-api-key-expires-at"
     }
     "###);
     meili_snap::snapshot!(code, @"400 Bad Request");