If you have a allergy to penicillin, is cefdinir safe?

Cefdinir is in the class, Cephalosporins and sensitivity is known to exist with the two types.
From drugs.com:
"Warnings
BEFORE THERAPY WITH Cefdinir IS INSTITUTED, CAREFUL INQUIRY SHOULD BE MADE TO DETERMINE WHETHER THE PATIENT HAS HAD PREVIOUS HYPERSENSITIVITY REACTIONS TO Cefdinir, OTHER CEPHALOSPORINS, PENICILLINS, OR OTHER DRUGS. IF Cefdinir IS TO BE GIVEN TO PENICILLIN-SENSITIVE PATIENTS, CAUTION SHOULD BE EXERCISED BECAUSE CROSS-HYPERSENSITIVITY AMONG β-LACTAM ANTIBIOTICS HAS BEEN CLEARLY DOCUMENTED AND MAY OCCUR IN UP TO 10% OF PATIENTS WITH A HISTORY OF PENICILLIN ALLERGY."