What “original DTS mix?” There was no DTS in 1989.
I didn’t say it was from 1989 and its irrelevant when the first DTS mix was made since it is still the original DTS mix, the original theatrical mix is something else entirely.
There are three known DTS mixes:
-the original DTS mix found on the DVD previously mentioned
-the DTS mix found on the blu-ray
-the DTS mix found on the 4K disc which has updated sfx