From 159e95f2e533baa2ef5bf5aaea930c0c7a90f38e Mon Sep 17 00:00:00 2001
From: An Phi <aphi@skidmore.edu>
Date: Tue, 10 May 2022 11:54:34 -0400
Subject: [PATCH] fix a regression introduced by #1146

---
 packages/legend-studio/src/stores/ChangeDetectionState.ts | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/packages/legend-studio/src/stores/ChangeDetectionState.ts b/packages/legend-studio/src/stores/ChangeDetectionState.ts
index 311478af33..fbdfa16f01 100644
--- a/packages/legend-studio/src/stores/ChangeDetectionState.ts
+++ b/packages/legend-studio/src/stores/ChangeDetectionState.ts
@@ -356,7 +356,6 @@ export class ChangeDetectionState {
   }
 
   stop(force = false): void {
-    this.graphObserveState.reset();
     this.changeDetectionReaction?.();
     this.changeDetectionReaction = undefined;
     if (force) {
@@ -752,7 +751,7 @@ export class ChangeDetectionState {
   }
 
   *observeGraph(): GeneratorFn<void> {
-    if (!this.graphObserveState.isInInitialState) {
+    if (this.initState.hasSucceeded) {
       throw new IllegalStateError(
         `Can't observe graph: change detection must be stopped first`,
       );