diff --git a/backend/web/server/plugins/aftral-lms/block.js b/backend/web/server/plugins/aftral-lms/block.js
index ea863da04a..1ecc3fb8e8 100644
--- a/backend/web/server/plugins/aftral-lms/block.js
+++ b/backend/web/server/plugins/aftral-lms/block.js
@@ -310,9 +310,9 @@ const getBlockLiked = async (userId, params, data) => {
   const user = await User.findById(userId, {role:1})
   const template = await getTemplate(data._id)
   if(user.role == ROLE_CONCEPTEUR) {
-    return template.likes.length > 0
+    return template._likes.length > 0
   }
-  return template.likes.some(like => idEqual(like, userId))
+  return template._likes.some(like => idEqual(like, userId))
 }
 
 const getBlockDisliked = async (userId, params, data) => {
@@ -320,9 +320,9 @@ const getBlockDisliked = async (userId, params, data) => {
   const template = await getTemplate(data._id)
   console.log(template)
   if(user.role == ROLE_CONCEPTEUR) {
-    return template.dislikes.length > 0
+    return template._dislikes.length > 0
   }
-  return template.dislikes.some(dislike => idEqual(dislike, userId))
+  return template._dislikes.some(dislike => idEqual(dislike, userId))
 }
 
 const setBlockLiked = async ({ id, attribute, value, user }) => {
@@ -331,17 +331,17 @@ const setBlockLiked = async ({ id, attribute, value, user }) => {
     return mongoose.models['block'].findByIdAndUpdate(template._id,
       {
         $pull: {
-          dislikes: user._id
+          _dislikes: user._id
         }, 
         $addToSet: {
-          likes: user._id
+          _likes: user._id
         }
       }
     )
   }
   else{
     return mongoose.models['block'].findByIdAndUpdate(template._id,
-      {$pull: {likes: user._id}})
+      {$pull: {_likes: user._id}})
   }
 }
 
@@ -351,25 +351,25 @@ const setBlockDisliked = async ({ id, attribute, value, user }) => {
     return mongoose.models['block'].findByIdAndUpdate(template._id,
       {
         $pull: {
-          likes: user._id
+          _likes: user._id
         }, 
         $addToSet: {
-          dislikes: user._id
+          _dislikes: user._id
         }
       }
     )
   }
   else{
     return mongoose.models['block'].findByIdAndUpdate(template._id,
-      {$pull: {dislikes: user._id}})
+      {$pull: {_dislikes: user._id}})
   }
 }
 
 const getTemplate = async(id) => {
-  let [currentBlock] = await mongoose.models.block.find({_id:id},{origin:1, likes:1, dislikes:1})
+  let [currentBlock] = await mongoose.models.block.find({_id:id},{origin:1, _likes:1, _dislikes:1})
   let currentOrigin = currentBlock.origin
   while(currentOrigin) {
-    [currentBlock] = await mongoose.models.block.find({_id:currentOrigin},{origin:1, likes:1, dislikes:1})
+    [currentBlock] = await mongoose.models.block.find({_id:currentOrigin},{origin:1, _likes:1, _dislikes:1})
     currentOrigin = currentBlock.origin
   }
   return currentBlock
diff --git a/backend/web/server/plugins/aftral-lms/functions.js b/backend/web/server/plugins/aftral-lms/functions.js
index c20dfe8642..2f52267bec 100644
--- a/backend/web/server/plugins/aftral-lms/functions.js
+++ b/backend/web/server/plugins/aftral-lms/functions.js
@@ -78,11 +78,11 @@ BLOCK_MODELS.forEach(model => {
   declareComputedField({model, field: 'resources_count', getterFn: getResourcesCount})
   declareComputedField({model, field: 'session', getterFn: getSession, requires:'parent.parent.parent.parent.parent'})
 
-  declareVirtualField({model, field: 'likes_count', instance: 'Number', requires:'likes'})
-  declareVirtualField({model, field: 'dislikes_count', instance: 'Number', requires:'dislikes'})
+  declareVirtualField({model, field: 'likes_count', instance: 'Number', requires:'_likes'})
+  declareVirtualField({model, field: 'dislikes_count', instance: 'Number', requires:'_dislikes'})
 
-  declareComputedField({model, field: 'liked', getterFn: getBlockLiked, setterFn: setBlockLiked, requires:'likes,origin'})
-  declareComputedField({model, field: 'disliked', getterFn: getBlockDisliked, setterFn: setBlockDisliked, requires:'dislikes,origin'})
+  declareComputedField({model, field: 'liked', getterFn: getBlockLiked, setterFn: setBlockLiked, requires:'_likes,origin'})
+  declareComputedField({model, field: 'disliked', getterFn: getBlockDisliked, setterFn: setBlockDisliked, requires:'_dislikes,origin'})
 })
 
 declareEnumField({model: 'homework', field: 'scale', enumValues: SCALE})
diff --git a/backend/web/server/plugins/aftral-lms/schemas/BlockSchema.js b/backend/web/server/plugins/aftral-lms/schemas/BlockSchema.js
index 9da3d75d9a..64e3476b07 100644
--- a/backend/web/server/plugins/aftral-lms/schemas/BlockSchema.js
+++ b/backend/web/server/plugins/aftral-lms/schemas/BlockSchema.js
@@ -191,7 +191,7 @@ const BlockSchema = new Schema({
     default: false,
     required: true,
   },
-  likes:{ 
+  _likes:{ 
     type: [{
       type: Schema.Types.ObjectId,
       ref: 'user',
@@ -199,7 +199,7 @@ const BlockSchema = new Schema({
     required: true,
     default: []
   },
-  dislikes:{ 
+  _dislikes:{ 
     type: [{
       type: Schema.Types.ObjectId,
       ref: 'user',
@@ -232,11 +232,11 @@ BlockSchema.virtual('search_text', {localField: 'tagada', foreignField: 'tagada'
 })
 
 BlockSchema.virtual('likes_count', DUMMY_REF).get(function(){
-  return this.likes.length || 0
+  return this._likes.length || 0
 })
 
 BlockSchema.virtual('dislikes_count', DUMMY_REF).get(function(){
-  return this.dislikes.length || 0
+  return this._dislikes.length || 0
 })
 
 // Validate Succes achievemnt