diff --git a/packages/client/src/components/Block.svelte b/packages/client/src/components/Block.svelte
index 37af28b4dc..65c2b38197 100644
--- a/packages/client/src/components/Block.svelte
+++ b/packages/client/src/components/Block.svelte
@@ -28,8 +28,11 @@
 
   const eject = () => {
     // Start the new structure with the root component
-    let definition = Object.values(structureLookupMap[$component.id])[0]
-      .instance
+    const rootMap = structureLookupMap[$component.id] || {}
+    let definition = { ...Object.values(rootMap)[0]?.instance }
+    if (!definition) {
+      return
+    }
 
     // Copy styles from block to root component
     definition._styles = {