麻烦高手解释下什么原因 求解决

NOTIC: [2048] Declaration of Think\Model\MongoModel::setInc() should be compatible with Think\Model::setInc($field, $step = 1, $lazyTime = 0) /home/wwwroot/mype/ThinkPHP/Library/Think/Model/MongoModel.class.php 第 17 行.
NOTIC: [2048] Declaration of Think\Model\MongoModel::setDec() should be compatible with Think\Model::setDec($field, $step = 1, $lazyTime = 0) /home/wwwroot/mype/ThinkPHP/Library/Think/Model/MongoModel.class.php 第 17 行.
NOTIC: [2048] Declaration of Think\Db\Driver\Mongo::connect() should be compatible with Think\Db\Driver::connect($config = '', $linkNum = 0, $autoConnection = false) /home/wwwroot/mype/ThinkPHP/Library/Think/Db/Driver/Mongo.class.php 第 18 行.
NOTIC: [2048] Declaration of Think\Db\Driver\Mongo::insertAll() should be compatible with Think\Db\Driver::insertAll($dataSet, $options = Array, $replace = false) /home/wwwroot/mype/ThinkPHP/Library/Think/Db/Driver/Mongo.class.php 第 18 行.