timestamps issue

database/migrations/2018_10_27_055927_create_wiki_groupnames.php

@@ -16,6 +16,7 @@ class CreateWikiGroupnames extends Migration
         Schema::create('wiki_groupnames', function(Blueprint $table) {
             $table->increments('id');
             $table->string('gname');
+            $table->timestamps();
         });
     }
 

database/migrations/2018_10_27_060042_create_wiki_member.php

@@ -17,6 +17,7 @@ class CreateWikiMember extends Migration
             $table->integer('uid');
             $table->integer('gid');
             $table->string('groupname');
+            $table->timestamps();
         });
     }