diff --git a/rhodecode/apps/repository/views/repo_pull_requests.py b/rhodecode/apps/repository/views/repo_pull_requests.py
--- a/rhodecode/apps/repository/views/repo_pull_requests.py
+++ b/rhodecode/apps/repository/views/repo_pull_requests.py
@@ -868,9 +868,21 @@ class RepoPullRequestsView(RepoAppView, 
         ancestor = source_scm.get_common_ancestor(
             source_commit.raw_id, target_commit.raw_id, target_scm)
 
+        # recalculate target ref based on ancestor
         target_ref_type, target_ref_name, __ = _form['target_ref'].split(':')
         target_ref = ':'.join((target_ref_type, target_ref_name, ancestor))
 
+        get_default_reviewers_data, validate_default_reviewers = \
+            PullRequestModel().get_reviewer_functions()
+
+        # recalculate reviewers logic, to make sure we can validate this
+        reviewer_rules = get_default_reviewers_data(
+            self._rhodecode_db_user, source_db_repo,
+            source_commit, target_db_repo, target_commit)
+
+        given_reviewers = _form['review_members']
+        reviewers = validate_default_reviewers(given_reviewers, reviewer_rules)
+
         pullrequest_title = _form['pullrequest_title']
         title_source_ref = source_ref.split(':', 2)[1]
         if not pullrequest_title:
@@ -882,22 +894,18 @@ class RepoPullRequestsView(RepoAppView, 
 
         description = _form['pullrequest_desc']
 
-        get_default_reviewers_data, validate_default_reviewers = \
-            PullRequestModel().get_reviewer_functions()
-
-        # recalculate reviewers logic, to make sure we can validate this
-        reviewer_rules = get_default_reviewers_data(
-            self._rhodecode_db_user, source_db_repo,
-            source_commit, target_db_repo, target_commit)
-
-        given_reviewers = _form['review_members']
-        reviewers = validate_default_reviewers(given_reviewers, reviewer_rules)
-
         try:
             pull_request = PullRequestModel().create(
-                self._rhodecode_user.user_id, source_repo, source_ref,
-                target_repo, target_ref, commit_ids, reviewers,
-                pullrequest_title, description, reviewer_rules,
+                created_by=self._rhodecode_user.user_id,
+                source_repo=source_repo,
+                source_ref=source_ref,
+                target_repo=target_repo,
+                target_ref=target_ref,
+                revisions=commit_ids,
+                reviewers=reviewers,
+                title=pullrequest_title,
+                description=description,
+                reviewer_data=reviewer_rules,
                 auth_user=self._rhodecode_user
             )
             Session().commit()