Meteor.startup(function () {
  // Reset Database only in environment dev
  if (process.env.NODE_ENV === 'development') {
    KSessions.remove({});
    Books.remove({});

    // Specific insert for Books
    Fixtures.books.forEach(function(rec) {
      if (Books.findOne(rec._id)) {
        Books.update(rec._id, rec);
      }
      else {
        Books.insert(rec);
      }
    });

    Meteor.publish("all_books", function() {
      return Books.find();
    });

    // Specific insert for KSessions
    Fixtures.ksessions.forEach(function(rec) {
      if (KSessions.findOne(rec._id)) {
        KSessions.update(rec._id, rec);
      }
      else {
        KSessions.insert(rec);
      }
    });

    Meteor.publish("all_ksessions", function() {
      return KSessions.find();
    });

    // Specific insert for users
    Fixtures.users.forEach(function(user) {
      if (! Meteor.users.findOne({username: user.username})) {
        Accounts.createUser(user);
      }

    });
  }
});
Meteor.startup(function () {
  // Reset Database only in environment dev
  if (process.env.NODE_ENV === 'development') {
    KSessions.remove({});
    Books.remove({});
    datas = Fixtures; // Specific datas for dev environment
  }
  else if (process.env.NODE_ENV === 'production') {
    datas = Datas; // Specific datas for prod environment
  }

  // Specific insert for Books
  datas.books.forEach(function(record) {
    if (Books.findOne(record._id)) {
      Books.update(record._id, record);
    }
    else {
      Books.insert(record);
    }
  });
  
  Meteor.publish("all_books", function() {
    return Books.find();
  });
  
  // Specific insert for KSessions
  datas.ksessions.forEach(function(record) {
    if (KSessions.findOne(record._id)) {
      KSessions.update(record._id, record);
    }
    else {
      KSessions.insert(record);
    }
  });
  
  Meteor.publish("all_ksessions", function() {
    return KSessions.find();
  });
  
  // Specific insert for users
  datas.users.forEach(function(user) {
    if (! Meteor.users.findOne({username: user.username})) {
      Accounts.createUser(user);
    }
  });
});

--- 
+++ 
@@ -3,41 +3,44 @@
   if (process.env.NODE_ENV === 'development') {
     KSessions.remove({});
     Books.remove({});
+    datas = Fixtures; // Specific datas for dev environment
+  }
+  else if (process.env.NODE_ENV === 'production') {
+    datas = Datas; // Specific datas for prod environment
+  }
 
-    // Specific insert for Books
-    Fixtures.books.forEach(function(rec) {
-      if (Books.findOne(rec._id)) {
-        Books.update(rec._id, rec);
-      }
-      else {
-        Books.insert(rec);
-      }
-    });
-
-    Meteor.publish("all_books", function() {
-      return Books.find();
-    });
-
-    // Specific insert for KSessions
-    Fixtures.ksessions.forEach(function(rec) {
-      if (KSessions.findOne(rec._id)) {
-        KSessions.update(rec._id, rec);
-      }
-      else {
-        KSessions.insert(rec);
-      }
-    });
-
-    Meteor.publish("all_ksessions", function() {
-      return KSessions.find();
-    });
-
-    // Specific insert for users
-    Fixtures.users.forEach(function(user) {
-      if (! Meteor.users.findOne({username: user.username})) {
-        Accounts.createUser(user);
-      }
-
-    });
-  }
+  // Specific insert for Books
+  datas.books.forEach(function(record) {
+    if (Books.findOne(record._id)) {
+      Books.update(record._id, record);
+    }
+    else {
+      Books.insert(record);
+    }
+  });
+  
+  Meteor.publish("all_books", function() {
+    return Books.find();
+  });
+  
+  // Specific insert for KSessions
+  datas.ksessions.forEach(function(record) {
+    if (KSessions.findOne(record._id)) {
+      KSessions.update(record._id, record);
+    }
+    else {
+      KSessions.insert(record);
+    }
+  });
+  
+  Meteor.publish("all_ksessions", function() {
+    return KSessions.find();
+  });
+  
+  // Specific insert for users
+  datas.users.forEach(function(user) {
+    if (! Meteor.users.findOne({username: user.username})) {
+      Accounts.createUser(user);
+    }
+  });
 });
Disable data change in prod and pre-prod environment
