First, you are probably referring to the 2013 federal government shutdown -- that's ancient history, and not relevant here.

Second, the 1099-S was issued with an SSN because someone in 2019 gave them that number.  

Third, you write "I intended to file 1041 for the trust, reporting the sale of the property."  That's exactly what you should do.  The SSN is not relevant either.

IRS might send a letter to the escrow company, telling it to withhold taxes on any more sales reported under that SSN because IRS knows it was assigned to a person deceased for many years.  If there is any other property left to sell, be more careful next time.