About Co-op work permit

[Maninder35]

I have a question when I landed in Canada I got my co-op work permit from airport and I came on student visa.6 months ago before starting my co-op work semester my friends said I need to apply for co-op work permit and the work permit you got from airport that was for doing part time work with study not for co-op term.And then I applied in end of November 2018 and I got confirmation for my work permit but then I changed my home because owner never gave us our mails.And even after I left that address I didnt get me work permit .But then I got to know that the work permit that I got from Airport was actually for co-op term and I didnt need to apply for other one.But now I am wondering that if immigration sent me the second one so they canceled my previous one or not? And the work permit that Now I have that I got from airport is valid for my co-op work term or I need to reapply new one?