diff --git a/packages/strapi-hook-mongoose/lib/index.js b/packages/strapi-hook-mongoose/lib/index.js
index 3829faed44..b2cc899a6a 100644
--- a/packages/strapi-hook-mongoose/lib/index.js
+++ b/packages/strapi-hook-mongoose/lib/index.js
@@ -174,7 +174,10 @@ module.exports = function (strapi) {
                 _.forEach(postLifecycle, (fn, key) => {
                   if (_.isFunction(target[model.toLowerCase()][fn])) {
                     collection.schema.post(key, function (doc, next) {
-                      target[model.toLowerCase()][fn](this, doc).then(next).catch(err => strapi.log.error(err));
+                      target[model.toLowerCase()][fn](this, doc).then(next).catch(err =>  {
+                        strapi.log.error(err);
+                        next(err);
+                      });
                     });
                   }
                 });
diff --git a/packages/strapi-plugin-content-manager/config/queries/mongoose.js b/packages/strapi-plugin-content-manager/config/queries/mongoose.js
index e5efe8f7db..b6104c9cac 100644
--- a/packages/strapi-plugin-content-manager/config/queries/mongoose.js
+++ b/packages/strapi-plugin-content-manager/config/queries/mongoose.js
@@ -106,11 +106,13 @@ module.exports = {
 
     const request = await this.create(values)
       .catch((err) => {
-        const message = err.message.split('index:');
-        const field = _.words(_.last(message).split('_')[0]);
-        const error = { message: `This ${field} is already taken`, field };
-
-        throw error;
+        if (err.message)
+        {
+          const message = err.message.split('index:');
+          const field = _.words(_.last(message).split('_')[0]);
+          err = { message: `This ${field} is already taken`, field };
+        }
+        throw err;
       });
 
     // Transform to JSON object.