Jet2 flight Leeds/Nice booked in right name but as Mr rather than Mrs. Will this cause a problem at check in?

Phoned Jet2 when spotted the problem only after checked in online. Jet2 say cannot change records because boarding p already produced and that it will be OK because the name is correct. The person I spoke to said he couldn't confirm in writing but gave me his name and said all calls are recorded. WilI there be a problem getting on the flight?