diff --git a/store/errors.go b/store/errors.go
index 191d5ea3e..b090e0385 100644
--- a/store/errors.go
+++ b/store/errors.go
@@ -20,4 +20,5 @@ var (
 		"cyclic depdency")
 	ErrSpaceWithChildsCantBeDeleted = errors.New("the space can't be deleted as it still contains " +
 		"spaces or repos")
+	ErrPreConditionFailed = errors.New("precondition failed")
 )