CRB check shows 21yr old conviction help

[stupidcupid]

hi i have recently had my avanced CRB check returned, showing my juvenile convictions 4 burglary & theft - non dwelling. i was 16 at the time & am now 37. and have never had a conviction or even a telling off since!. i fear this will cost me my job. also my convictions are not in my name even tho i dont deny doing them. they have got my middle name wrong on my convictions. i feel 21 years is long enough. many thanks for anyhelp