[FOSDEM] Signing other people's keys with an new key?

Hello, Just after the keysigning party, I *accidentially* revoked the key that I used for the keysigning party. (Sounds stupid enough to be true;-) Now, as a sign of courtesy, I can still sign the keys of the people I successfully authenticated during the keysigning party with a new key, without expecting them to sign my new key on the spot, of course. Any practical objection to that? What would the Web of Trust gurus say?