You have a mod corruption. I would suggest cleaning your savegame (.ess) of all mods. From the error message you described, I would say that you have one of
Adul's mods installed.
To clean your game, first go into the Morrowind Settings folder in the Data Files Morrowind folder. Find the line that says "EnableYesToAll=0" and change the 0 to a 1. Save the document and close it.
Then go into the folder with the plugins. Delete or remove all mods from that folder.
Open Morrowind, with only the Master Files and official plugins activated.
When the error messages pop up, say Yes To All and continue to load your game. Once the game is loaded, save. It is now ostensibly clear of all mod corruption.
But, usually not completely. Open (or download and open) TESAME. Select your savegame (.ess) from the Morrowind folder and clean it.
Patch your game.