diff --git a/internal/repository/project/grant.go b/internal/repository/project/grant.go
index 41fa983bcb..458b3cff6b 100644
--- a/internal/repository/project/grant.go
+++ b/internal/repository/project/grant.go
@@ -23,14 +23,14 @@ var (
 
 func NewAddProjectGrantUniqueConstraint(grantedOrgID, projectID string) *eventstore.EventUniqueConstraint {
 	return eventstore.NewAddEventUniqueConstraint(
-		UniqueRoleType,
+		UniqueGrantType,
 		fmt.Sprintf("%s:%s", grantedOrgID, projectID),
 		"Errors.Project.Grant.AlreadyExists")
 }
 
 func NewRemoveProjectGrantUniqueConstraint(grantedOrgID, projectID string) *eventstore.EventUniqueConstraint {
 	return eventstore.NewRemoveEventUniqueConstraint(
-		UniqueRoleType,
+		UniqueGrantType,
 		fmt.Sprintf("%s:%s", grantedOrgID, projectID))
 }