I will answer you first in French, then add a few words in English, since I am more comfortable in French, quite simply.
The original rule in the Constitution in 1867 was that the privileges and immunities of the House of Commons should not exceed those of the United Kingdom. This was later changed so that the privileges and immunities of the House of Commons could not exceed those of the United Kingdom when the Canadian federal law determining those immunities and privileges was passed.
Canada can now effectively adopt privileges and immunities that exceed those of the United Kingdom, under section 44 of the Constitution Act, 1982. Therefore, the privileges and immunities now provided for in the Parliament of Canada Act may, in some cases, exceed those of the United Kingdom without being declared unconstitutional.
The privileges that are in the Parliament of Canada Act could exceed those existing in the United Kingdom without being invalid, without being declared unconstitutional, because of section 44 of the Constitution Act, 1982.