edit model

backend/models/modelToucan.js

@@ -10,7 +10,4 @@ var toucanSchema = new Schema ({
     date: {type : Date, required: true},
 });
 
-// La date doit être unique
-toucanSchema.index({date:-1},{unique: true});
-
 module.exports = mongoose.model("Toucan",toucanSchema);
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