diff --git a/packages/cozy-konnector-libs/docs/api.md b/packages/cozy-konnector-libs/docs/api.md
index 240321d2a..534b0f264 100644
--- a/packages/cozy-konnector-libs/docs/api.md
+++ b/packages/cozy-konnector-libs/docs/api.md
@@ -159,6 +159,9 @@ DefinePlugin</p>
 <dt><a href="#UNKNOWN_ERROR">UNKNOWN_ERROR</a> : <code>string</code></dt>
 <dd><p>unkown error</p>
 </dd>
+<dt><a href="#UNKNOWN_ERROR_PARTIAL_SYNC">UNKNOWN_ERROR_PARTIAL_SYNC</a> : <code>string</code></dt>
+<dd><p>The synchronization is complete but some elements may be missing</p>
+</dd>
 <dt><a href="#USER_ACTION_NEEDED_SCA_REQUIRED">USER_ACTION_NEEDED_SCA_REQUIRED</a> : <code>string</code></dt>
 <dd><p>Renewal of authentication required</p>
 </dd>
@@ -1523,6 +1526,12 @@ User needs to accept new terms
 ## UNKNOWN\_ERROR : <code>string</code>
 unkown error
 
+**Kind**: global constant  
+<a name="UNKNOWN_ERROR_PARTIAL_SYNC"></a>
+
+## UNKNOWN\_ERROR\_PARTIAL\_SYNC : <code>string</code>
+The synchronization is complete but some elements may be missing
+
 **Kind**: global constant  
 <a name="USER_ACTION_NEEDED_SCA_REQUIRED"></a>
 
diff --git a/packages/cozy-konnector-libs/src/helpers/errors.js b/packages/cozy-konnector-libs/src/helpers/errors.js
index 981b1d294..bacea5381 100644
--- a/packages/cozy-konnector-libs/src/helpers/errors.js
+++ b/packages/cozy-konnector-libs/src/helpers/errors.js
@@ -134,6 +134,13 @@ const TERMS_VERSION_MISMATCH = 'TERMS_VERSION_MISMATCH'
  */
 const UNKNOWN_ERROR = 'UNKNOWN_ERROR'
 
+/**
+ * The synchronization is complete but some elements may be missing
+ *
+ * @type {string}
+ */
+const UNKNOWN_ERROR_PARTIAL_SYNC = 'UNKNOWN_ERROR.PARTIAL_SYNC'
+
 /**
  * Renewal of authentication required
  *
@@ -197,6 +204,7 @@ module.exports = {
   MAINTENANCE,
   TERMS_VERSION_MISMATCH,
   UNKNOWN_ERROR,
+  UNKNOWN_ERROR_PARTIAL_SYNC,
   VENDOR_DOWN,
   VENDOR_DOWN_BANK_DOWN,
   VENDOR_DOWN_LINXO_DOWN