diff --git a/.changeset/gold-numbers-drive.md b/.changeset/gold-numbers-drive.md
new file mode 100644
index 0000000..9de8fc6
--- /dev/null
+++ b/.changeset/gold-numbers-drive.md
@@ -0,0 +1,5 @@
+---
+"@chialab/quantum": patch
+---
+
+Throw edit mode error only when a realm exists.
diff --git a/src/Realm.js b/src/Realm.js
index fcdb407..c82b8a7 100644
--- a/src/Realm.js
+++ b/src/Realm.js
@@ -77,13 +77,13 @@ export function attachRealm(node) {
  * @returns {Realm|null} The realm instance or null.
  */
 export function getRealm(node, editMode = false) {
+    const realm = node[REALM_SYMBOL] ?? null;
     if (opened) {
-        if (editMode) {
+        if (editMode && realm) {
             throw new Error('Cannot get realm in edit mode when all realms are open');
         }
         return null;
     }
-    const realm = node[REALM_SYMBOL] ?? null;
     if (realm && !realm.open) {
         return realm;
     }