Trump's lawyers did provide an explanation. They said they immediately deleted his Truth Social post, but did not realize a copy remained on his website.
Which is plausible, because there was no media coverage about that copy until yesterday. And once the media brought it to their attention, his lawyers immediately deleted that copy, too.
Is that enough to satisfy the judge? I think so, or at least enough to avoid jail. It would be a different matter if this were a new post instead of a copy of the old one, or if the lawyers took their time in deleting it.