diff --git a/frontend/src/lib/components/SchemaEditor.svelte b/frontend/src/lib/components/SchemaEditor.svelte
index c42834957e..cf52d6e29e 100644
--- a/frontend/src/lib/components/SchemaEditor.svelte
+++ b/frontend/src/lib/components/SchemaEditor.svelte
@@ -102,7 +102,9 @@
 		}
 		schema = schema
 		schemaString = JSON.stringify(schema, null, '\t')
-		jsonEditor.setCode(schemaString)
+		if (jsonEditor) {
+			jsonEditor.setCode(schemaString)
+		}
 		dispatch('change', schema)
 	}