what it means vs what it meant

[anhnha]

I would have no idea what it meant if it were said to me.

Can I rewrite the sentence above as follows?
I would have no idea what it means if it were said to me.

[philo2009]

I would have no idea what it meant if it were said to me.

Can I rewrite the sentence above as follows?
I would have no idea what it means if it were said to me.

Informally, yes. Tense concord, however, makes the past tense (meant) more formally appropriate in this case.