Front Office error in a Local Copy

[Newbie Presta]

Hi all, I've an old version of Prestashop (1.4.4.1). I decided to upgrade it and first i made a local copy of it. The copy works but and error appears when the PS_MODE_DEV is On.

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Notice: Undefined variable: HOOK_CENTER_COLUMN inC:\xampp1\htdocs\esportsparra\tools\smarty\sysplugins\smarty_internal_data.php on line 291
Warning: Invalid argument supplied for foreach () inC:\xampp1\htdocs\esportsparra\classes\CompareProduct.php on line 72
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Any help would be really appreciated.