diff --git a/restapi/index.php b/restapi/index.php
index 8f391f6c3..9d744745c 100644
--- a/restapi/index.php
+++ b/restapi/index.php
@@ -1669,7 +1669,7 @@ class RestapiController { /* {{{ */
         $doc = $dms->getDocument($args['id']);
         if($doc && $attrdef) {
             if($attrdef->getObjType() !== SeedDMS_Core_AttributeDefinition::objtype_document) {
-                return $response->withJson(array('success'=>false, 'message'=>'Attribute definition not suitable for documents', 'data'=>''), 409);
+                return $response->withJson(array('success'=>false, 'message'=>'Attribute definition "'.$attrdef->getName().'" not suitable for documents', 'data'=>''), 409);
             }
 
             $params = $request->getParsedBody();
@@ -1726,7 +1726,7 @@ class RestapiController { /* {{{ */
             $version = $doc->getContentByVersion($args['version']);
         if($doc && $attrdef && $version) {
             if($attrdef->getObjType() !== SeedDMS_Core_AttributeDefinition::objtype_documentcontent) {
-                return $response->withJson(array('success'=>false, 'message'=>'Attribute definition not suitable for document versions', 'data'=>''), 409);
+                return $response->withJson(array('success'=>false, 'message'=>'Attribute definition "'.$attrdef->getName().'" not suitable for document versions', 'data'=>''), 409);
             }
 
             $params = $request->getParsedBody();
@@ -1780,7 +1780,7 @@ class RestapiController { /* {{{ */
         $obj = $dms->getFolder($args['id']);
         if($obj && $attrdef) {
             if($attrdef->getObjType() !== SeedDMS_Core_AttributeDefinition::objtype_folder) {
-                return $response->withJson(array('success'=>false, 'message'=>'Attribute definition not suitable for folders', 'data'=>''), 409);
+                return $response->withJson(array('success'=>false, 'message'=>'Attribute definition "'.$attrdef->getName().'" not suitable for folders', 'data'=>''), 409);
             }
 
             $params = $request->getParsedBody();