diff --git a/src/config/constants.js b/src/config/constants.js
index 93c794b..304a435 100644
--- a/src/config/constants.js
+++ b/src/config/constants.js
@@ -13,33 +13,14 @@ const UserActions = [
 ];
 
 const LevelPositions = [
-  "B",
-  "D",
-  "DB",
-  "DF",
-  "F",
-  "L",
-  "LB",
-  "LD",
   "LDB",
   "LDF",
-  "LF",
-  "LU",
   "LUB",
   "LUF",
-  "R",
-  "RB",
-  "RD",
   "RDB",
   "RDF",
-  "RF",
-  "RU",
   "RUB",
   "RUF",
-  "U",
-  "UB",
-  "UF",
-  "W",
 ];
 
 const InventoryScopes = ["Inventory", "Material", "Item"];
diff --git a/src/models/Level.js b/src/models/Level.js
index 857b561..4e0dee5 100644
--- a/src/models/Level.js
+++ b/src/models/Level.js
@@ -27,13 +27,14 @@ const schema = new mongoose.Schema(
         type: {
           required: true,
           type: String,
-          enum: SubLevelTypes
-        },
-        postition: {
-          required: true,
-          type: String,
-          enum: LevelPositions,
+          enum: SubLevelTypes,
         },
+        postition: [
+          {
+            type: String,
+            enum: LevelPositions,
+          },
+        ],
         sub_level_id: {
           required: true,
           type: mongoose.Schema.Types.ObjectId,
diff --git a/src/models/Sublevel.js b/src/models/Sublevel.js
index 465de94..b9cde4e 100644
--- a/src/models/Sublevel.js
+++ b/src/models/Sublevel.js
@@ -39,11 +39,12 @@ const schema = new mongoose.Schema(
           type: String,
           enum: SubLevelTypes,
         },
-        postition: {
-          required: true,
-          type: String,
-          enum: LevelPositions,
-        },
+        postitions: [
+          {
+            type: String,
+            enum: LevelPositions,
+          },
+        ],
         sub_level_id: {
           required: true,
           type: mongoose.Schema.Types.ObjectId,
@@ -55,11 +56,11 @@ const schema = new mongoose.Schema(
       type: Boolean,
       default: false,
     },
-    inventory: [
-      {
-        type: mongoose.Schema.Types.ObjectId,
-        ref: "Inventory",
-      },
+    preffered_inventory: [
+      // {
+      //   type: mongoose.Schema.Types.ObjectId,
+      //   ref: "Inventory",
+      // },
     ],
   },
   {