diff --git a/notebooks/03_Merge_Tables.ipynb b/notebooks/03_Merge_Tables.ipynb
index 2d76867d8..6adbbd5bf 100644
--- a/notebooks/03_Merge_Tables.ipynb
+++ b/notebooks/03_Merge_Tables.ipynb
@@ -415,7 +415,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 7,
+   "execution_count": null,
    "metadata": {},
    "outputs": [
     {
@@ -503,7 +503,7 @@
     }
    ],
    "source": [
-    "uuid_key = LFPOutput.fetch(limit=1, as_dict=True)[-1]\n",
+    "uuid_key = (LFPOutput & nwb_file_dict).fetch(limit=1, as_dict=True)[-1]\n",
     "restrict = LFPOutput & uuid_key\n",
     "restrict"
    ]
@@ -546,7 +546,7 @@
     }
    ],
    "source": [
-    "result1 = restrict.fetch_nwb()\n",
+    "result1 = restrict.fetch_nwb(restrict.fetch1(\"KEY\"))\n",
     "result1"
    ]
   },
@@ -594,7 +594,7 @@
     }
    ],
    "source": [
-    "result2 = (LFPOutput & nwb_key).fetch_nwb()\n",
+    "result2 = LFPOutput().fetch_nwb(nwb_key)\n",
     "result2 == result1"
    ]
   },
diff --git a/notebooks/py_scripts/03_Merge_Tables.py b/notebooks/py_scripts/03_Merge_Tables.py
index 33b8e9a0e..ac3ad4e69 100644
--- a/notebooks/py_scripts/03_Merge_Tables.py
+++ b/notebooks/py_scripts/03_Merge_Tables.py
@@ -5,7 +5,7 @@
 #       extension: .py
 #       format_name: light
 #       format_version: '1.5'
-#       jupytext_version: 1.16.0
+#       jupytext_version: 1.15.2
 #   kernelspec:
 #     display_name: spy
 #     language: python
@@ -137,17 +137,17 @@
 # by referencing this or other features.
 #
 
-uuid_key = LFPOutput.fetch(limit=1, as_dict=True)[-1]
+uuid_key = (LFPOutput & nwb_file_dict).fetch(limit=1, as_dict=True)[-1]
 restrict = LFPOutput & uuid_key
 restrict
 
-result1 = restrict.fetch_nwb()
+result1 = restrict.fetch_nwb(restrict.fetch1("KEY"))
 result1
 
 nwb_key = LFPOutput.merge_restrict(nwb_file_dict).fetch(as_dict=True)[0]
 nwb_key
 
-result2 = (LFPOutput & nwb_key).fetch_nwb()
+result2 = LFPOutput().fetch_nwb(nwb_key)
 result2 == result1
 
 # ## Selecting data