diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/schemas/beamforming-complex-voltages-observation-scheduling-unit-observation-strategy.json b/SAS/TMSS/backend/src/tmss/tmssapp/schemas/beamforming-complex-voltages-observation-scheduling-unit-observation-strategy.json
index 2aea1682130225ae3089e9cdbdce83886d9981fb..608d9e7c92b6f34190ca926bb1bd2df5ff23a7cf 100644
--- a/SAS/TMSS/backend/src/tmss/tmssapp/schemas/beamforming-complex-voltages-observation-scheduling-unit-observation-strategy.json
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/schemas/beamforming-complex-voltages-observation-scheduling-unit-observation-strategy.json
@@ -880,18 +880,6 @@
               }
             ]
           }
-        ],
-        "station_groups": [
-          {
-            "stations": [
-              "CS002",
-              "CS003",
-              "CS004",
-              "CS005",
-              "CS006",
-              "CS007"
-            ]
-          }
         ]
       },
       "specifications_template": "beamforming observation"
diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-beamforming-observation-scheduling-unit-observation-strategy.json b/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-beamforming-observation-scheduling-unit-observation-strategy.json
index 53ed5dbf731f4a4e2ef9c9e43380c81690042e68..9425a872ab74b6e3f26209f06bccb081c4c5dd5c 100644
--- a/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-beamforming-observation-scheduling-unit-observation-strategy.json
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-beamforming-observation-scheduling-unit-observation-strategy.json
@@ -21,7 +21,8 @@
         ],
         "station_groups": [
           {
-            "stations": [ "CS002", "CS003", "CS004", "CS005", "CS006", "CS007"]
+            "stations": [ "CS002", "CS003", "CS004", "CS005", "CS006", "CS007"],
+            "max_nr_missing": 1
           }
         ],
         "tile_beam": {
diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-observation-scheduling-unit-observation-strategy.json b/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-observation-scheduling-unit-observation-strategy.json
index b083d1177d7f51941dc17ce3f9b9eceff5f6a357..9d82b941e5577b48a4bd2f2b63808ee757ef4784 100644
--- a/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-observation-scheduling-unit-observation-strategy.json
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/schemas/simple-observation-scheduling-unit-observation-strategy.json
@@ -25,7 +25,8 @@
         "antenna_set": "HBA_DUAL_INNER",
         "filter": "HBA_110_190",
         "station_groups": [ {
-            "stations": ["CS002", "CS003", "CS004", "CS005", "CS006", "CS007"]
+            "stations": ["CS002", "CS003", "CS004", "CS005", "CS006", "CS007"],
+            "max_nr_missing": 1
         }],
         "tile_beam": {
           "direction_type": "J2000",