diff --git a/backend/postgres/postgres.go b/backend/postgres/postgres.go
index cf119de..e8c9b6f 100644
--- a/backend/postgres/postgres.go
+++ b/backend/postgres/postgres.go
@@ -311,7 +311,7 @@ func (be *postgresBackend) CompleteOrchestrationWorkItem(ctx context.Context, wi
 		builder := strings.Builder{}
 		builder.WriteString("INSERT INTO NewTasks (InstanceID, EventPayload) VALUES ")
 		for i := 0; i < newActivityCount; i++ {
-			builder.WriteString(fmt.Sprintf("($%d, $%d)", 3*i+1, 3*i+2))
+			builder.WriteString(fmt.Sprintf("($%d, $%d)", 2*i+1, 2*i+2))
 			if i < newActivityCount-1 {
 				builder.WriteString(", ")
 			}