Fix enable/disable bug (#3662)

### What problem does this PR solve?

Fix enable/disable bug   #3628

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

---------

Co-authored-by: liuhua <10215101452@stu.ecun.edu.cn>
Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

rag/utils/es_conn.py

@@ -294,7 +294,7 @@ class ESConnection(DocStoreConnection):
                         f"Condition `{str(k)}={str(v)}` value type is {str(type(v))}, expected to be int, str or list.")
             scripts = []
             for k, v in newValue.items():
-                if not isinstance(k, str) or not v:
+                if (not isinstance(k, str) or not v) and k != "available_int":
                     continue
                 if isinstance(v, str):
                     scripts.append(f"ctx._source.{k} = '{v}'")