diff --git a/module/repo/model.php b/module/repo/model.php
index c3717e9890..18071a5972 100644
--- a/module/repo/model.php
+++ b/module/repo/model.php
@@ -2945,10 +2945,11 @@ class repoModel extends model
         {
             if($deletedBranch == 'master') continue;
 
-            $revisionIds = $this->dao->select('revision')->from(TABLE_REPOBRANCH)->where('repo')->eq($repoID)->andWhere('branch')->eq($deletedBranch)->fetchPairs('revision');
-            $fileIds     = $this->dao->select('id')->from(TABLE_REPOFILES)->where('revision')->in($revisionIds)->fetchPairs('id');
+            $revisionIds       = $this->dao->select('revision')->from(TABLE_REPOBRANCH)->where('repo')->eq($repoID)->andWhere('branch')->eq($deletedBranch)->fetchPairs('revision');
+            $branchRevisionIds = $this->dao->select('revision,count(branch) as count')->from(TABLE_REPOBRANCH)->where('revision')->in($revisionIds)->groupBy('revision')->having('count')->eq(1)->fetchPairs('revision', 'revision');
+            $fileIds           = $this->dao->select('id')->from(TABLE_REPOFILES)->where('revision')->in($branchRevisionIds)->fetchPairs('id');
 
-            $this->dao->delete()->from(TABLE_REPOHISTORY)->where('id')->in($revisionIds)->exec();
+            $this->dao->delete()->from(TABLE_REPOHISTORY)->where('id')->in($branchRevisionIds)->exec();
             $this->dao->delete()->from(TABLE_REPOFILES)->where('id')->in($fileIds)->exec();
             $this->dao->delete()->from(TABLE_REPOBRANCH)->where('repo')->eq($repoID)->andWhere('branch')->eq($deletedBranch)->exec();
         }