How can solve remix warning

#1

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when I click compile and run the give warning how can fix

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#2

Those warning messages are related to a contract from openzeppelin , you should just ignore them, changing your self the functionality of an openzeppelin contract is not the best approach nor easiest.

Still your contract should be able to work, those are just warning messages, not error messages, its a change that is recommended to apply but is not mandatory.

Carlos Z