possible fix for #2416 by dropping indexes from the creation of many-to-many relation tables

lib/associations/has-many.js

@@ -131,14 +131,11 @@ module.exports = (function() {
     }
     }
 
 
     if (typeof this.through.model === 'string') {
     if (typeof this.through.model === 'string') {
-      var defineOptions = _.extend(this.options, {
+      this.through.model = this.sequelize.define(this.through.model, {}, _.extend(this.options, {
         tableName: this.through.model,
         tableName: this.through.model,
+        indexes: {}, //we dont want indexes here (as referenced in #2416)
         paranoid: false  // A paranoid join table does not make sense
         paranoid: false  // A paranoid join table does not make sense
-      });
-      //we dont want indexes here
-      delete defineOptions.indexes;
-      console.log(defineOptions);
-      this.through.model = this.sequelize.define(this.through.model, {}, defineOptions);
+      }));
 
 
       if (this.targetAssociation) {
       if (this.targetAssociation) {
         this.targetAssociation.through.model = this.through.model;
         this.targetAssociation.through.model = this.through.model;