diff --git a/backend/src/object/object.service.ts b/backend/src/object/object.service.ts
index 836a64d..9e97f2a 100644
--- a/backend/src/object/object.service.ts
+++ b/backend/src/object/object.service.ts
@@ -380,8 +380,10 @@ export class ObjectService {
       }
       
       // Check if field is writable (for authorization)
-      if (fieldDef.defaultWritable === false) {
-        this.logger.warn(`Field ${key} is not writable, skipping`);
+      // Support both snake_case (from DB) and camelCase (if mapped)
+      const defaultWritable = fieldDef.default_writable ?? fieldDef.defaultWritable;
+      if (defaultWritable === false || defaultWritable === 0) {
+        this.logger.warn(`Field ${key} is not writable (default_writable = ${defaultWritable}), skipping`);
         continue;
       }